Term
Classic (or serial) Polyandry |
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Definition
One female paired with two or more males during breeding cycle
(Spotted Sandpiper) |
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Term
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Definition
One male paired with one female during breeding cycle.
90% of all birds |
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Term
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Definition
Two or more males cooperate to assist single female.
only six bird species
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Term
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Definition
1 of one gender paired with 2 or more of another gender:
Polygyny and Polyandry (classic & cooperative)
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Term
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Definition
One male paired with two or more females.
2% of all species, including blackbirds and wrens. |
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Term
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Definition
Innermost layer of vertibrate's eye. Transmits images from lens to brain. Contains receptors: cones and rods |
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Term
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Definition
Light receptors in eyes, used in daytime. Detect color and provide sharpness. |
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Term
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Definition
Responsible for night vision. See only black and white. |
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Term
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Definition
Low frequency such as ocean waves. |
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Term
What percentage of a bird's weight is their egg? |
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Definition
Varies from 2% (hummingbird) to 25% (Kiwis). Songbirds eggs are about 10%. |
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Term
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Definition
Chicks are hatched blind, naked, and helpless. |
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Term
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Definition
Chicks hatch ready to leave nest within hours. |
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