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7 Sci Test 7 Ch 8
| Term | Definition |
|---|---|
| altitudinal | type of migration birds perform when they migrate fairly short distances by moving up and down a mountain |
| altricial | type of chicks are featherless and helpless when they hatch |
| alula | retractable group of feathers supported by a bird's "thumb" bone |
| anting | when birds use ants to clean their plumage |
| brood patch | area birds lose their feathers from for more effective heat transfer |
| calcium carbonate | what the outer shell of an egg is made of |
| contour | strong feathers found on a bird's body, wings, and tail |
| crop | food storage sac in a bird's esophagus |
| down | soft, fluffy feathers found close to a bird's body |
| dusting | type of bathing that does not use water |
| field marks | colors, patterns, and markings that are characteristic of a specific bird species |
| flyways | migration routes followed year afteryear |
| gaping | type of bill used to catch insects in flight |
| germinal spot | region of an egg where the embryo develops |
| gizzard | used to grind food and make it more easily absorbed |
| gliding | type of flight allows birds to coast "downhill" |
| hovering | remaining stationary in air |
| humerus | wing bone to which the major flight muscles connect |
| incubation | keeping eggs warm for proper chick development |
| instinct | built-in knowledge birds are born with |
| keel | ridge on the sternum |
| keratin | substance feather and bills are made of |
| megapodes | group of birds that does not provide any parental care for their young |
| mobbing | event when smaller birds harass a larger bird |
| monocular | vision that allows a bird's eye to see a different portion of the world |
| pectoralis minor | used to raise the wings |
| perching | bird feet with 3 forward toes & 1 hind toe |
| peregrine falcon | fastest flying bird |
| preen gland | produces oil that birds spread over their feathers |
| primary flight | feathers extending from a bird's "hand" to the tip of its wing |
| soaring | using thermals to gain altitude without expending energy |
| syrinx | produces sound without vocal cords |
| yolk | nutrient-rich fluid that feeds an unhatched chick |