AP PSYCHOLOGY

Detailed explanation-1: -A cacophony of disorganized sound erupts from the treetops as each bird’s call competes with the next. When a female finally appears, the males begin bobbing and strutting, fanning their delicate wing feathers, each trying to secure the females attention for himself.

Detailed explanation-2: -When he saw male birds with bright colors, he thought that their colors were due to sexual selection-adaptations that help an individual get a mate. Males that impress a female with their plumage, for instance, are more likely to mate and have offspring.

Detailed explanation-3: -Males are usually the most colorful sex because females are more likely to be in short supply due to the extra work involved in incubation and chick rearing. Males must thus compete for the chance to mate with them.

Detailed explanation-4: -Two evolutionary forces have combined to shape the extraordinary birds–of–paradise. The males owe their exotic plumes and dances to sexual selection – the subtle power of females choosing mates over millions of years. And the bewildering diversity of species is the result of geographic isolation.