Amazonian manatee {Trichechus inunguis} calf being fed by hand, Endangered, Captive, Instituto Nacional de Pesquisas da Amazonas, Manaus, Brazil  ,  ACTION,BEHAVIOUR,CONSERVATION,FEEDING,FRESHWATER,MAMMALS,MANATEES,PEOPLE,SOUTH AMERICA,TROPICAL,TROPICAL RAINFOREST,VERTEBRATES,VERTICAL,SOUTH-AMERICA,Sirenia  ,  Mark Carwardine