Behavior
The American Goldfinch is gregarious during the non-breeding season, when it is often found in large flocks, usually with other finches. Flocks generally fly in an undulating pattern, creating a wave-shaped path. During the breeding season, it lives in loose colonies. While the nest is being constructed, the male will act aggressively toward other males who intrude into his territory, driving them away, and the female reacts in the same way toward other females. This aggressiveness fades once the eggs have been laid.
The American Goldfinch does not act aggressively toward predators within its territory; its only reaction is alarm calling. Predators include snakes, weasels, squirrels, and Blue Jays, which may destroy eggs or kill young, and hawks and cats, which pose a threat to both young and adults. As of 2007, the oldest known American Goldfinch was 10 years and 5 months old.
Read more about this topic: American Goldfinch
Famous quotes containing the word behavior:
“He is not a true man of science who does not bring some sympathy to his studies, and expect to learn something by behavior as well as by application. It is childish to rest in the discovery of mere coincidences, or of partial and extraneous laws. The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one.”
—Henry David Thoreau (1817–1862)
“No matter how calmly you try to referee, parenting will eventually produce bizarre behavior, and I’m not talking about the kids. Their behavior is always normal.”
—Bill Cosby (b. 1937)
“The confusion of emotions with behavior causes no end of unnecessary trouble to both adults and children. Behavior can be commanded; emotions can’t. An adult can put controls on a child’s behavior—at least part of the time—but how do you put controls on what a child feels? An adult can impose controls on his own behavior—if he’s grown up—but how does he order what he feels?”
—Leontine Young (20th century)