AP BIOLOGY

Detailed explanation-1: -Q#1: Red-crowned cranes breed in spring and early summer. Choose a proximate explanation: Breeding is most likely to be successful in spring and early summer. Increasing day length triggers the release of breeding hormones.

Detailed explanation-2: -Red-crowned Cranes use their long, slender bill to peck at many types of prey, including insects, fish, small mammals, and plants.

Detailed explanation-3: -These cranes prefer to nest in marshes with relatively deep water and standing, dead vegetation. Red-crowned cranes are well adapted to cold temperatures. The Russian and Chinese populations mainly winter in the Yellow River delta. the coast of Jiangsu province, China, and the Korean Demilitarized Zone.

Detailed explanation-4: -They are active during the day and usually seek food in deep water marshes, feeding by pecking as they walk. Their long toes mean that they can walk in soil that is soft and muddy, and they use their long bill to probe the water for prey. Red-crowned cranes communicate with each other during their courtship dance.