what is the motive behind it?
The key motives for poaching are poverty,  is part of their personal or cultural history,  earn money to support their families, thrill in it.
Poaching
 commercial gain, home consumption, trophies, pleasure and thrill in killing wildlife, or because they disagree with certain hunting regulations, claim a traditional right to hunt, or have negative dispositions toward legal authority. In rural areas of the United States, the key motives for poaching are poverty. Interviews conducted with 41 poachers in the Atchafalaya River basin in Louisiana revealed that 37 of them hunt to provide food for themselves and their families; 11 stated that poaching is part of their personal or cultural history; nine earn money from the sale of poached game to support their families; eight feel exhilarated and thrilled by outsmarting game wardens.

what is giant otter? It is a South American carnivorous mammal. where did it get the name from? Giant otter" translates literally as "nutria gigante" .and "lontra gigante" in Spanish and Portuguese which family does it belong to? Weasel family what sort of habitat does it select to live in? It seems to choose clear, black waters with rocky or sandy bottoms is there a need for it to be conserved? Yes, The IUCN listed the giant otter as "endangered". how did they become so? Poaching is one of the main reasons, others being habitat destruction and degradation what does the first threat mean? Illegal hunting or capturing of wild animals are there any legal acts to protect these animals from it? UNANSWERABLE
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Poaching [SEP] Motives
Armed conflict in Africa has been linked to intensified poaching and wildlife declines within protected areas, likely reflecting the disruption of traditional livelihoods, which causes people to seek alternative food sources. Results of an interview survey conducted in several villages in Tanzania indicate that one of the major reasons of poaching is for consumption and sale of bushmeat. Usually, bushmeat is considered a subset of poaching due to the hunting of animals regardless of the laws that conserve certain species of animals. Many families consume more bushmeat if there are no alternative sources of protein available such as fish. The further away the families were from the reserve, the less likely they were to illegally hunt wildlife for bushmeat.