Some horned animals are antelope, buffalo, and goats. A V formation helps the birds conserve energy because the V-shaped air streams created by the birds in front reduce the wind resistance for the other birds. When the lead bird gets tired, another bird takes over. Extinct is forever. It means the entire species of animals has died and can never return.
Passenger pigeons are extinct.
Endangered animals are in immediate danger of becoming extinct. The few remaining ones are dying off. The California condor is an endangered animal. All Rights Reserved worldwide.