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Birds/Evolution

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Across
1.appearance of feathers
3.smooth, streamlined feathers for flight
7.the study of birds
8.shorebird that has seen a sharp decrease in numbers due to the unavailability of an important food source along its migratory route
10.lightweight bones, strong flights muscles for flying
14.adaptation that many male birds use to attract a mate
15.fluffy, insulating feathers
16.the first part of the theory of natural selection
17.old naval ship used for exploring the Galapogas
Down
1.cleaning feathers, preparing for flight
2.adaptation for birds that wade in the water
4.their blue blood is an evolutionary gift that makes these organisms living fossils
5.seasonal movement of animals
6.sitting on eggs for incubation
9.adaptation for raptors who catch and kill prey with their feet
11.the fossil link between reptiles and birds
12.naturalist whose theory of natural selection changed scientific understaning
13.leaving the nest

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