Exam%202_key - Exam 2, Ornithology, EEB 484/585 KEY Your...

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Exam 2, Ornithology, EEB 484/585 1 Your name:____________________________________ Section 1: fill in the blanks (2 pts each) Note: S ome questions have more than correct answer. 1. ______________________are structures that physically protect, insulate, and hide eggs and young birds, whereas bowers function only to __________________________. One difference between bowers and leks is ____________________________________ _______________________________________________________________________ . 2. Optimal foraging theory has proven a useful tool in studying the choices birds make about what they eat. Basic OFT assumes that birds forage in such a way that they maximize their net ______________________________________________. 3. Natural geographic variation in _________________________________ over the earth’s surface means that biologists can sample feathers from a bird (captured anywhere) and determine where that feather was grown. 4. _________________________________________________ is an example of one direct phenotypic benefit to females for being choosy regarding the males with whom they mate with. 5. Different materials are often used in different parts of nest building. The 4 physical elements of a nest are structure, attachment, and sometimes adornment and _______________________________ . One important factor that affects what materials used in this last component of nest building is __________________________________. 6. List one way that the foraging ecology of a bird has affected one of that bird’s sensory organs (list both foraging niche, and element of sensory organ that functions in obtaining that food): __________________________________________________________ . KEY nests attract a female or mate leks do not usually involve the creation of physical structures, leks involve more than 1 male that display together energy intake any parental care behavior: e.g., feeding rate, nest defense, ability to defend lots of resources, predator-freed territory, attentive to nest incubation stable isotopes (deuterium, C13…) lining susceptibility to water-logging, insulation needs, softness of structural materials, susceptibility to nest ectoparasites e.g., nocturnal predator/3-d sound localization, probing for buried prey/herbst corpuscles in bill, aerial insectivore/regions of visual acuity
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Exam 2, Ornithology, EEB 484/585 2 7. All birds have tetra-chromatic vision but species differ in the wavelengths their 4 th cone type is sensitive to. Only 4 lineages including parrots and most passerines have the ability to see _____________________________________________________. Section 2: True/False (2 pts each) 8. The “mafia hypothesis” is one explanation for why hosts of Brown-headed Cowbirds often fail to eject parasitic eggs, even though cowbird eggs are usually very different in size and color than the host egg. The basis of this hypothesis relies on Cowbirds revisiting nests and vandalizing the nests of hosts that eject their parasitic egg. TRUE
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This note was uploaded on 06/16/2008 for the course ECOL 484 taught by Professor Mr.m during the Spring '07 term at University of Arizona- Tucson.

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Exam%202_key - Exam 2, Ornithology, EEB 484/585 KEY Your...

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