Emigration, Migration and Nomadism |
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abnormal aestivation amongst anadromous animals appear associated bird migration birds breeding ground breeding migration breeding purposes breeding season Bushmanland butterflies catadromous climatic coast colony condition Crustacea Danaida desert diffusion eggs emigration in mass environment evidence fact factors feeding female fertility fish flight food supply gametic migration gonads gorilla growth habit habitat herds hibernation home area home territory hunting increase individual induce influence inhabit insects instance instinct journey land large numbers larvae lemming live locusts male mammals mass emigration mate matter migratory movement miles nest neutral territory nomadic normal northern northward nursery observations occupied occur ovaries pair parturition perhaps period plankton prey probably recognised records referred regarded region reproductive system river says seek sexual season song thrush spawning species spring springbuck stimulating summer swarm takes place territorial rights tion tribes ungulates vitamine vitamine E wander whales winter quarters young