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What is the biological species concept? |
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Species are groups of freely interbreeding natural populations that are reproductively isolated from other such groups. |
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Ruffled grouse, guan, quail, wild turkey |
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Albatross, shearwater, petrel |
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Cormorant, frigatebird, boobies, anhinga, gannet |
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Pelicans, herons, bitterns, egrets, ibis, spoonbill |
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Diurnal birds of prey: hawk, vultures, osprey, condor, kite, eagle |
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Falcons, kestrel, caracara |
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Shorebirds: plover, sandpiper, gull, tern, auk, skua, skimmer, murre, puffin |
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Cuckoos, roadrunner, anis |
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Woodpecker, jacamar, toucan, puffbirds, barbet |
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most diverse, over half of all extant bird species |
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What are some of the purposes of feathers? |
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Heat regulation, ornamentation, flight |
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What is a crop? Do all birds have crops? |
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The crop serves as a location for temporary food storage. Not all birds have crops. |
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What purpose does the gizzard serve? |
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The gizzard is the portion of the digestive tract prior to the stomach that functions in the physical breakdown of food. |
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What does the term oviparous mean? |
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What are the two bird-dinosaur evolution theories? Which is the current accepted theory? |
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1. Thecodont Hypothesis- Birds evolved BEFORE dinosaurs from thecodonts 2. Theropod Hypothesis- Birds evolved from theropod dinosaurs ***ACCEPTED*** |
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Which feathers are intended for flight purpose? Which aren't? |
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Flight: Asymmetrical Non-flight: Symmetrical |
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