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EEB 208 FINAL EXAM: Exam I
Elphick's Introduction to Conservation Biology; a review for Exam One
94
Biology
Undergraduate 3
04/26/2008

Additional Biology Flashcards

 


 

Cards

Term

L2:

What are some ways to mislead readers with data? 

Definition

1.)    Biased data

2.)    Lying with averages and the effects of extreme data points

3.)    Spurious correlations

4.)    extrapolation beyond the data

5.)    inappropriate comparisons

6.)    misleading graphics

Term

L2:

When is data biased? 

Definition

-          When the data is based on an unbiased, representative selection of all the possible individuals that could have been sampled?

Term

L2:

How can one lie with averages? 

Definition

-          There are three different “averages” (mean, median, mode), they can all be very different.

Term

L2:

What is a spurious correlation? 

Definition

-          When people assume or state two things actually affect one another just because they are correlated (both change together in some systematic way).

Term

L2:

What is an inappropriate comparison? 

Definition

-          When different types of statistics are used in a comparison.

Term

L2:

How  can one extrapolate beyond data to mislead readers? 

Definition

-          Often with graphs, the lines of a graph may extend beyond the actual data, and any kind of application of a recorded trend to the future (inappropriately).

Term

L2:

 How can one mislead with graphs?

Definition
Axes with no units, broken axes, log scales, titles that do not match the data.
Term

L3:

What is the current human population and future predicted trends? 

Definition

-          Human population is currently at 6.5 billion and not expected to slow until 9 or 10 billion.

Term

L3:

What types of resource needs will the population increase cause? 

Definition

a.)    Increased food needs

b.)    Increased water needs

c.)    Increased energy needs

Term

L3:

What is the ecological footprint and what trends is it currently undergoing? 

Definition

-          An estimate of humanities impact on the earth, it is on the rise. Currently 2.2 hectares needed per person, 1.8 is available. Must reduce our consumption of materials!

Term

L3:

How much has the temperature changed in the past century?

Definition

-          .5 degree Celsius on average in the past 100 years, on mountain peaks it has risen one degree.

Term

L3:

What is the cause for climate change? 

Definition

-          Increase CO2 levels (from 316 ppmv to 370 ppmv in the past 50 years), release of other greenhouse gases (methane, CFC’s, nitrous oxide)

Term

L3:

What are some environmental changes that climate change will cause? 

Definition

a.)    a.) Average temperatures are expected to increase (but variation… some will cool)

b.)    b.) Precipitation patterns will overall increased (but variation, some places will become drier)

c.)    c.) More flooding and soil erosion in areas of more rainfall, increased need for irrigation in areas where rainfall has declined.

d.)    Ice caps will continue melting, and sea levels will rise.

Term

L3:

What are some biological changes of climate change? 

Definition

a.)    Widespread changes in patterns of primary production, perhaps because of less cloud cover over the rainforests and increased solar radiation.

b.)    Growing seasons have grown longer with warm temperatures (eleven days in Europe).

c.)    Geographic ranges of species have shifted in concert with increasing temperatures.

d.)    Conflicting changes in life-history characteristics of species (predator/prey).

Term

L4:

 What are the basic components of biodiversity (there are six)?

Definition

1.)    Species diversity

2.)    Genetic diversity

3.)    Population structure

4.)    Communities

5.)    Ecological and abiotic processes

6.)    Biological phenomena

Term

L4:

What is species richness? 

Definition

-          The number of species present in an area.

Term

L4:

What is species evenness? 

Definition

-          Relative abundance of species.

Term

L4:

What is biodiversity? 

Definition

-          Variation in the distribution of species in space.

Term

L4:

What is a keystone species? 

Definition

-          Species that play a disproportionate role in influencing the nature of an ecological community. (ex. Otters)

Term

L4:

What is an ecosystem engineer? 

Definition

-          Species that play a disproportionate role in influencing the nature of an ecosystem. (ex. Beavers)


Term

L4:

Why is  genetic diversity important to biodiversity? 

Definition

-          It is the basis for evolutionary change, and more specifically it is the basis of crop breeding.

Term

L4:

What is a polymorphic gene? 

Definition

-          A gene with multiple alleles.

Term

L4:

What is an allele? 

Definition

-          one member of a pair or series of different forms of a gene.

Term

L4:

What is heterozygosity? 

Definition

-           When a cell has different alleles occupying the gene's position in each of the homologous chromosome. (Aa)

Term

L5:

How many species are currently described, and how many are left to be described? 

Definition

-          1.5 million, and 5 – 30 million are left to be described?

Term

L5:

What types of organisms continue to be described? 

Definition

-          Mammals (although mostly previously known and not distinguished as their own species), birds, mostly invertebrates.

Term

L5:

Why is it so difficult to calculate the number of organisms that are left to be described? 

Definition

-          To make an estimate of the number of undescribed, several other numbers must be described first. Those numbers are then combined (compounded errors).

Term

L5:

What does species richness often correlate with (there are four major things)? 

Definition

1.)    Richness increases with habitat diversity.

2.)    Richness increases with habitat patch size.

3.)    Richness decreases with increasing elevation (and increasing depth in water).

4.)    Richness decreases with increasing latitude.

Term

L5:

In what ways is richness predictable? 

Definition

1.)    Tropics > temperate.

2.)    More structural complexity > less complexity.

3.)    High productivity > low productivity.

4.)    Mainland communities > island communities.

5.)    Larger area > smaller area

6.)    Ecotones (edges) > interiors.

Term

L5:

Why do conservation biologists often work to identify areas of high species richness? 

Definition

-          It is NOT to “maximize” or increase richness, it is to streamline conservation efforts. Work where you can save the most; it is efficiency.

Term

L5:

What is a hotspot and what are some characteristics of them? 

Definition

-          Locations of high biodiversity. Most are tropical/areas of rainforest, but also some Mediterranean climates (California, Cape of South Africa), some are temperate (New Zealand), and there are marine hotspots too (between S.E. Asia and Australia).

Term

L5:

Do areas of species richness ALWAYS coincide across taxonomic groups? 

Definition

-          NO, often do not.

Term

L5:

Do zones of endemism often contain zones of endemism or high numbers of rare species? 

Definition

-          No, often do not! But some areas that do coincide are the South African Cape, Madagascar, coastal Brazil.

Term

L6:

Define extinction. 

Definition

Extinction: no members of the species alive

Term

L6:

Define local extinction.

Definition

Local extinction: gone from a particular area

Term

L6:

Define extirpation. 

Definition

Extirpation: local extinction

Term

L6:

Define extinct in the wild. 

Definition

Extinct in the wild: individuals remain, but only in captivity/under cultivation.

Term

L6:

Define ecologically extinct. 

Definition

Ecologically extinct: still persists, but is so rare that its ecological role is negligible.

Term

L6:

Define extant. 

Definition

Extant: not extinct

Term

L6:

Define endemic. 

Definition

Endemic: restricted to a certain small area.

Term

L6:

When did the five mass extinctions occur? 

Definition

-          Ordovician, Devonian, Permian, Triassic, Cretaceous.

Term

L6:

 

What theory has served in helping to estimate current and future extinction rates?

 

Definition
The island biogeography theory.
Term

L6:

What is the island biogeography theory equation? 

Definition

-          S = cAz

-           S = # of sp, A = area of an island, z = constant describing the slope of the line relating s to A when the data is on a log scale, c is another constant (z/c vary according to islands/animals of interest).

Term

L6:

What does E.O.Wilson's estimation using the island biogeography theory say? 

Definition

-          34 species go extinct daily; tens of thousands in the next few decades.

Term

L6:

When using the island biogeography equation model to estimate extinction rates, the following assumptions were made by E.O. Wilson. 

Definition

1.)    so many sp. occur in the rainforests that we can basically ignore other habitats.

2.)    there are about 5 million species total.

3.)    z = .15

4.)    rainforest is lost at about 1% per year.

5.) all species are specialists.

6.) marine species are not important. 

Term

L7:

Define extinction debt.

 

Definition
when a species persists even after its habitat has been altered or reduced (often in remnant patches); although extinctions are expected they will not occur until sometime in the future.
Term

L7:

what are some important results of Brook et. all's investigation on singapore? 

Definition

a.)    Extinction rates varied throughout the different habitats studied.

b.)    Extinction rates varied among the different taxonomic groups studied.

c.)    The majority of the species on Singapore have gone extinct in the past 200 years.

d.)    Large species were especially likely to have gone extinct.

e.)    Many of the remaining species are in reserves.

Term

L7:

What makes species vulnerable to extinction? 

Definition

1.)    Small populations

2.)    Small geographic range

3.)    Population size fluctuates a lot

4.)    Habitat specialists

5.)    Species in symbiotic relationships

6.)    Large species

7.)    Species with low reproductive rates

8.)    Species with complex life-histories

9.)    Species that are poor dispersers

10.)   Species that live on islands

Term

L7:

What characteristics make small populations vulnerable to extinction? 

Definition

-          Rare in the classic sense: there are not many individuals in the population.

-          Random events are likely to have a greater effect.

-          Less genetic variation.

Term

L7:

Define "chain of extinction". 

Definition

-          When one species involved in a symbiotic relationship becomes extinct, the other species in the relationship is destined to go extinct as well.

Term

L7:

Why are low reproductive rates a reason for vulnerability to extinction? Isn't this a natural characteristic of some species? 

Definition

-          Usually, low reproductive rates are just a characteristic of some species, and is not disadvantageous until: an outside influence causes the species survival rates to drop.

Term

L7:

Please tell me about the passenger pigeon. 

Definition

-          Once speculated to be the most numerous species of land bird on earth; flocks of 2 billion birds reported in the 1800’s. In 200 years, they have gone extinct: hunting for food, killed because they were seen as crop pests, and died because their homes (forests) were cut down.

Term

L8:

Please tell me about the heath hen. 

Definition

-          Very common when Europeans first began inhabiting America, began declining as people used them for food. By 1907, there were 50 left on Martha’s Vineyard. A reserve was made, and there were 2000 birds in eight years. In 1916, a fire, terrible weather, and influx of predators (goshawks) as well as the spread of disease (from turkeys) made them go extinct (extinctions take time to occur!).

Term

L8:

Why do species decline in numbers (there are NINE)? 

Definition

1.)    Isolated catastrophic events.

2.)    Long-term ecological change.

3.)    Loss of species integrity.

4.)    Habitat destruction.

5.)    Habitat fragmentation.

6.)    Used by humans.

7.)    Disruption of behavior.

8.)    Increased genetic homozygosity.

9.)    Pollution.

Term

L1:

Describe two ways in which conservation biology is similar to medicine. 

Definition

- there is a lot of uncertainty in both fields.

- science is often influenced by political/social agendas.

 

Term

E1:

Which of the following statements about the species that remain to be described by scientists are true?

a.) at least 2/3 of the earths species remain to be described.

b.) species that remain are all in the tropics.

c.) new species continue to be found in the US.

d.) new species of mammals continue to be described.

e.) most species that remain are vertebrates.

f.) most species that reman are plants. 

Definition

CIRCLE:

a.), c.) and d.) 

Term

E1:

Which of the following is an accurate definition of the word "average"?

a.) the middle value when all values are organized from smallest to largest.

b.) middle value when all values are organized in the order they are collected. 

c.) the sum of all values divided by the number of values.

d.) the most common value.

e.) the mean value.

f.) the sum of all the values divided by the mean. 

Definition

CIRCLE:

a.), c.), d.), e.) 

Term

E1

Which of the following statements about hotspots is correct?

a.) a richness hotspot is somewhere that has a lot of very rare species.

b.) Orme et. all found very low congruence between three types of hotspots for birds.

c.) Madagascar, Brazil and Siberia are all hotspots.

d.)  All global hotspots are in the tropics.

e.) Marine hotspots are generally close to terrestrial hotspots.

f.) protecting hotspots would ensure protection of most global biodiversity. 

Definition

CIRCLE:

b.) 

Term

E1

In 1989, Wilson estimate that 34 species go extinct daily. Which of the following assumptions does that estimate make?

a.) all species are specialists.

b.) marine species are not important.

c.) there are 5 million species on earth.

d.) all species are in the temperate zone.

e.) the number of species in a habitat does not change as the area of habitat increases.

f.) the number of species in a habitat patch increases quite gradually  as the area of habitat increases. 

Definition

CIRCLE

a.), b.), c.), f.) 

Term

E1

In a recent study, Brook et. al. described extinction patterns on theh island of Singapore. Which of the following results came out of that study?

a.) extinction rates were high in all habitats.

b.) extinction rates are very similar for all types of organisms.

c.) the majority of the species that occur on Singapore have gone extinct in the last 200 yrs.

d.) small sp. were very likely to go extinct.

e.) many of the remaining sp. were primarily in reserves.

f.) most remaining sp. are well protected by reserves and not likely to go extinct. 

Definition

CIRCLE

c.), e.) 

Term

E1

Which of the following statements about extinction are correct?

a.) since 1500, most extinctions have been in mountainous areas.

b.) since 1500, birds living on islands are more likely to have gone xtinct than those living on mainland.

c.) since 1500, most recorded extinctions have involved amphibians.

d.) most species that have ever lived on earth are extinct.

e.) current extinction rates are typical of those that have gone on through geological time.

f.) current extinction rates are higher than have ever occurred. 

Definition

CIRCLE

b.), d.) 

Term

E1

Which of the following are key results of the study on climate change by Root et. al?

a.) sp. at lower altitudes are most affected by climate change.

b.) atmospheric CO2 has increased a lot in the past century.

c.) sea-levels are rising, but slower than predicted.

d.) About four in five of the species that have been studied show effects consistent with climate change.

e.) spring events are shifted late in the year at low latitudes only.

f.) shifts in phrenology are consistent across species. 

Definition

CIRCLE

d.) 

Term

E1

Which of the following is a component of biological diversity?

a.) the migration of a monarch butterfly. 

b.) species evenness.

c.) interactions among sp.

d.) species richness.

e.) the smallpox virus.

f.) variation in human DNA.

 

Definition

CIRCLE

a.), b.), c.), d.), e.), f.) 

Term

E1

Which of the following statements correctly link a species with the factors that threaten it?

a.) red cockaded woodpeckers are threatened because thair behavior limits their reproductice rate when habitat is limiting.

b.) puritan tiger beetles are threatened because they have a symbiotic relationship with ants.

d.) many trout populations are threatened with hybridization with other sp. of trout.

e.) flattened musk turtles are threatened because they are naturally rare.

f.) sea turtles are threatened because their habitat has become fragmented. 

Definition

CIRCLE:

a.), b.), c.), d.) 

Term

E1

Which of the following statements about species richness are usually true?

a.) islands have higher richness than the mainland.

b.) high elevations have lower richness than lower elevations.

c.) structurally complex habitats have lower richness than simpler habitats.

d.) highly productive areas have higher richness than unproductive areas.

e.) increasing species richness is an important goal of conservation biology.

f.) richness patterns in one taxonomic group are a good sign of richness patterns in all groups. 

Definition

CIRCLE

d.) 

Term

L0

TINAMIFORMES 

Definition
(TINAMOUS)
• 47 species.
• Neotropical.
• Able to fly (unlike ratites), and have well developed feathers.
• Glossy, well pigmented eggs.
Term

L0

RHEIFORMES 

Definition
(RHEAS)
• 2 species.
• South American (“New World ostriches”).
• Smaller than ostriches, emu, etc.
• Flightless, with loose, “fluffy” feathers.
Term

L0

STRUTHIONIFORMES 

Definition
(OSTRICH)
• 1 species.
• Largest living bird (though lots of competition for this claim in the past).
• African.
• Flightless, no feather tracts, feathers “fluffy”.
• Very strong/fast runner, only 2 toes.
Term

L0

CASUARIIFORMES 

Definition
(EMU, CASSOWARY)
• 4 species.
• Australasian.
• Flightless.
• Cassowaries have a head casque (functions poorly known, but may include: pushing through dense
vegetation without injuring head, shoveling in forest floor to look for food, indicating dominance/age),
and a sharp, elongate inner toe that acts like a 10 cm long dagger (and is used in defense).
Term

L0

DINORNITHIFORMES 

Definition
(KIWIS)
• 3 species.
• New Zealand.
• Largest eggs relative to body size of all birds.
• Flightless, hair-like feathers.
• Nocturnal; feed by probing in ground; have amazing sense of smell and nostrils are located on bill tip
(unlike any other bird).
Term

L0

PODICIPEDIFORMES 

Definition
(GREBES)
• 21 species.
• Found worldwide.
• Aquatic birds, feed by diving and swimming underwater using feet.
• Distinctive lobed toes.
• Build floating nests on aquatic vegetation.
Term

L0

SPHENISCIFORMES 

Definition
(PENGUINS)
• 17 species.
• Mostly found in Southern Ocean, but 1 species is tropical.
• Highly aquatic, wing-propelled underwater swimmers, with wings so modified that they cannot fly.
• Many adaptations to life in very cold conditions (e.g., dense feather coat, no apteria, thick fat layer).
Term

L0

PROCELLARIFORMES 

Definition
(TUBE-NOSED SEABIRDS: ALBATROSSES, PETRELS, SHEARWATERS, ETC.)
• Approx. 115 species.
• All oceans.
• Tubes on top of bill are unique to this order: direct salt excretions away from salt glands, may also play
a role in sense of smell.
• Highly pelagic: spend entire life at sea, except when nesting.
• Huge range in size, from 6 inches long to birds with a 12 foot wing span.
Term

L0

PELECANIFORMES 

Definition
(PELICANS, CORMORANTS, BOOBIES, FRIGATEBIRDS, ETC.)
• Approx. 67 species.
• Found in all oceans, and throughout tropical and temperate land masses.
• Aquatic.
• Group is defined by totipalmate feet, which means that there is webbing linking all four toes. (Note
there is some controversy over whether the birds in this order are all related; some suggest that
totipalmate feet may have arisen through convergent evolution in some groups.)
• All species have some form of an extensible gular pouch below the bill. This is most well developed
in the pelicans.
Term

L0

ANSERIFORMES 

Definition
(WATERFOWL: DUCKS, GEESE, SWANS; PLUS SCREAMERS)
• Approx. 161 species.
• Found worldwide (screamers in South America only).
• Mostly aquatic (except the screamers).
• Front three toes are webbed, hind toe is elevated.
• Unlike most birds, the males have a penis (may facilitate sperm transfer since these birds copulate on
the water).
Term

L0

PHOENICOPTERIFORMES 

Definition
(FLAMINGOS)
• 5 species.
• Tropics and subtropics worldwide (except Australia; also extending to southern South America).
• Aquatic, typically found in salt lakes and shallow lagoons; usually colonial, often with immense
numbers.
• Filter feeders – that’s what those funky bills are for (not croquet!).
• Breeding can be quite erratic, depending on conditions.
• The taxonomy of this group has been very controversial. Sometimes flamingos are classified as being
most closely related to the Anseriformes (e.g., their bills are quite duck-like), at other times to the
Ciconiiformes (e.g., they are quite heron-like in overall morphology)
Term

L0

CICONIIFORMES 

Definition
(HERONS, STORKS, ETC.)
• Approx. 120 species.
• Recently it has been recognized that the New World vultures (including condors) are really members
of this order, and not Falconiformes as previously classified. Their similarity to Old World vultures
(which are Falconiformes) is the result of convergent evolution. This adds another 7 species!
• Found worldwide.
• Mostly long-legged, long-necked, aquatic wading birds.
• Mostly colonial.
• Herons have powerdowns (specialized feathers that disintegrate and are used in feather care)
Term

L0

FALCONIFORMES 

Definition
(HAWKS, FALCONS, ETC.)
• Approx. 311 species.
• Order includes Old World vultures, but not the New World vultures (see Ciconiiformes).
• Worldwide.
• Mostly meat eaters (some are insectivores) and have hooked bill and talons.
• Many species are sexually dimorphic (females usually larger than males).
• Big size range, from relatively small falcons (approx. robin size) to huge eagles.
Term

L0

GALLIFORMES 

Definition
(PHEASANTS, QUAIL, GROUSE, TURKEY, ETC.)
• Approx. 258 species.
• Nearly worldwide.
• Terrestrial.
• Eat grains, invertebrates, some eat leafy plant matter.
• Have a large gizzard and a large intestinal tract.
• Feathers have a large, distinct aftershaft.
Term

L0

GRUIFORMES 

Definition
(CRANES, RAILS, ETC.)
• Approx. 210 species.
• Group is very diverse, with a wide range of body morphologies. Consequently, there is some
disagreement as to whether the order is monophyletic.
• Worldwide (including many tiny tropical islands).
• Includes terrestrial, semi-aquatic, and fully aquatic species.
• Most species (especially rails) are very secretive.
Term

L0

CHARADRIIFORMES 

Definition
(SHOREBIRDS, GULLS, AUKS, ETC.)
• Over 300 species.
• Worldwide.
• Mostly waterbirds (some are terrestrial, but derived from waterbirds).
• Taxonomically this order in united by various features of the skeleton and syrinx, but there is also a lot
of variation within the group.
Term

L0

GAVIIFORMES 

Definition
(LOONS)
• 5 species.
• Holarctic (northern hemisphere).
• Aquatic, underwater foot-propelled divers: have webbed, laterally compressed feet and legs to
facilitate underwater swimming.
• Eat fish.
• Monogamous, with long-term pair bonds.
Term

L0

COLUMBIFORMES 

Definition
(PIGEONS AND DOVES)
• > 300 species.
• Worldwide.
• Plump-bodied birds, with short legs and relatively small heads.
• Mostly seed-eaters, but some are fruit eaters (e.g., fruit pigeons).
• Have a large crop and produce “crop milk” to feed their young.
• The now extinct dodo, was a member of this order.
Term

L0

PSITTACIFORMES 

Definition
(PARROTS)
• Approx. 358 species.
• Pantropical, with high diversity of species in Australia.
• Hooked bill, fleshy tongue (which is used to manipulated food), zygodactyl feet (2 toes pointing
forward, 2 pointing backwards: in most birds 3 point forwards and 1 backwards).
• Mostly fruit and seed eaters (but some are carnivorous!).
• Mostly very colorful.
• Mostly very gregarious, flocking birds, usually form long-term pair bonds, long-lived (macaws can
live several decades).
Term

L0

COLIIFORMES 

Definition
(MOUSEBIRDS)
• 6 species.
• African.
• Crested, with long tails.
• All toes can be directed forwards.
• Lack apteria.
• Very sociable.
Term

L0

MUSOPHAGIFORMES 

Definition
(TURACOS)
• 23 species.
• African.
• Arboreal.
• Reversible outer toe (probably helps them to cling on to branches while perching).
• Mostly vegetarian.
• Most have crests on the tops of their heads, and many have brightly colored bare skin around the eye
and bill.
• Birds in this order also have unique plumage pigments that produce green (turacoverdin) and red
(turacin) colors.
Term

L0

CUCULIFORMES 

Definition
(CUCKOOS, PLUS HOATZIN)
• 143 species.
• Worldwide (Hoatzin in South America).
• Many cuckoo species, especially those in Old World, are brood parasites.
• Have zygodactyl feet.
• Most species are insectivorous, although some eat small vertebrates (roadrunners eat rattlesnakes).
Many cuckoos are well known for eating very hairy caterpillars that are shunned by most birds.
Hoatzin eat leaves and have modified intestinal tracts.
Term

L0

STRIGIFORMES 

Definition
(OWLS)
• Approx. 178 species.
• Worldwide.
• Mostly nocturnal birds of prey.
• Many anatomical features facilitate hunting in the dark.
• Rounded heads, eyes on front of the head (rather than sides), facial disks with specialized feathers that
funnel sounds to the ear openings, some have asymmetrical ears, skulls, etc.
Term

L0

CAPRIMULGIFORMES 

Definition
(NIGHTJARS, OILBIRD, POTOOS, ETC.)
• 113 species.
• Worldwide in temperate and tropical zones.
• Crepuscular (comes out at dawn or dusk) or nocturnal.
• Mostly insectivorous, catching prey while in flight. Have very large mouths surrounded by rictal
bristles.
• Plumages are very cryptic; almost impossible to find during the day.
Term

L0

APODIFORMES 

Definition
(SWIFTS AND HUMMINGBIRDS)
• Approx. 402 species: 103 species of swift and 319 species of hummingbird.
• Worldwide (hummingbirds only in the Americas).
• Extremely aerial. Swifts feed on insects on the wing and rarely touch land except to nest.
Hummingbirds feed on insects and on nectar and have specialized flight that allows them to hover and
provides extraordinary maneuverability when feeding at flowers.
• Translation of Apodiformes implies “without feet”: legs are very short, feet are very small.
• Swifts have a large mouth (good for catching insects), but a tiny bill; hummingbirds have a long
needle-like bill with a long tongue that is ideal for drinking up nectar.
• Both swifts and hummingbirds have long narrow wings, with specialized wing skeletal anatomy.
Term

L0

TROGONIFORMES 

Definition
(TROGONS)
• 39 species.
• Pantropical (except Australasia).
• Heterodactyl feet (toes number 1 and 2 point backwards; similar to zygodactyl except that that
involves toes 1 and 4 pointing backwards). Note that this toe arrangement is not found in any other
order of birds.
• Eats mostly fruit and insects.
• Brightly colored, largely iridescent green often with yellow or red below. Note that the red pigment in
these birds is unusually unstable and fades quickly once the bird dies (hence museum specimens do not
show the colors very well).
Term

L0

CORACIIFORMES 

Definition
(KINGFISHERS, HORNBILLS, ETC.)
• Approx. 218 species.
• Worldwide.
• Syndactyl feet (two of the front toes are fused at the base); in birds this is only found in this order.
• These birds mostly have big heads (often relatively big bills) and relatively small feet.
• Many are very brightly colored.
• Many are cavity nesters.
Term

L0

PICIFORMES 

Definition
(WOODPECKERS, TOUCANS, ETC.)
• Approx. 410 species.
• Worldwide (mostly tropics).
• Zygodactyl feet.
• Diversity of feeding habits; woodpeckers and honeyguides especially well known.
Y)
Term

L0

PASSERIFORMES 

Definition
(PERCHING BIRDS)
• Approx. 5700 species - more than half of all species of birds.
• Worldwide.
• Characteristic features include: enlarged flexible hind toe; unique sperm, palate, oil glands and limb
muscles.
• Extremely diverse group.
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