Bird Feather Knowledge

2. most modern birds have this type of feather
10. barn owl feather comb-like structure on outer vane that plays a role in noise reduction during flight
12. displays and sound production are shaped by this form of natural selection
14. used to clean feathers, preserve moistness, maintain waterproofing and regulate bacteria plus fungi
15. a variant of the feathers used for mechanical sensory purposes
17. these feathers range in number and are attached to the ulna
21. this coloration group includes bright green, blue and iridescences
22. this part of the feather usually has hooks
23. the most common function of feathers
24. this form of feather care is for external parasite removal
25. most birds have ten of these type of feather

1. pigment group that includes reds, pinks, oranges, and yellow
3. pigment group that includes brown, grey, black, tan
4. this type of feather usually lacks hooks and a rachis
5. feathers that have long shafts and used for mechanical sensory purposes
6. function of feathers that helps to keep heat in body
7. pigment group that includes reds, browns, and some greens
8. a hypothesis says that feathers are a super-evolved form of this
9. feathers that form aerodynamic shape of bird with extensive fluffy segments
11. special kind of contour feather
13. when birds allow ants to run all over wings or when they pick up an ant and rub in its feathers
16. another name for this part of the feather is "calamus"
18. these extend laterally from the "shaft" of the feather
19. this is also known as the "shaft" of a feather
20. what birds do for the growth of new feathers
21. the barbules of this feather lack hooks and rachis is longer than longest barb