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describe arguments for and against classifying feathers as an adaptation to flying in birds.
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- Contrast the arboreal and cursorial hypotheses for the origin of flight in birds.adapted from What Is That Bird?by the U.S. Fish and Wildlife Service The first step in bird identification is learning to observe. Watch, listen, and record your observations in a journal using descriptive words and sketches, or photograph birds to capture a permanent, detailed image that you can study later. If you are just starting to watch birds, consider familiarizing yourself with the ones that you see daily. What are their general characteristics? Are they big or small, colorful or drab? Do they sit still or flit from branch to branch? Then, try comparing new birds that you see with the common birds that you already know. Is your new discovery the size of a sparrow, a robin, or a crow? Is its bill short or long, hooked or straight? Learning the basic form and structure, or morphology, of a bird will help you to make comparisons of birds. Concentrate on the shape and size of the beak, including the relative size of the upper and lower beak; length of the outer tail…Explain how a bird’s wing produces lift. What features help to prevent stalling at low flight speeds? What features help to reduce drag?
- Determine if the following pairs are HOMOLOGOUS STRUCTURES or ANALOGOUS STRUCTURES 1.) Bat wing and bird wing 2.) Dragonfly wing and hummingbrind wing 3.) Dragonfly wing and bumbleebee wingDo you believe that experiments might be useful in determining the adaptive function of the pecten, if it indeed serves an adaptive function? Outline a simple experiment to see whether the presence of a pecten in the bird eye is an adaptation.Discuss the adaptations of pigeon?