Complex sentence: Where survey data is available, it shows some degree of depletion either by hunting for bush meat or habitat loss due to deforestation, however, it's a widely spread and presumably numerous species so it isn't as endangered as other forest denizens.
Split into simpler sentences: Where survey data is available, it shows some degree of decline, either by hunting for bush meat or habitat loss due to deforestation. However, it is a widely spread, and presumably numerous, species so is not as endangered as other forest denizens.