 Though it is formally classified as "P. t. schweinfurthii", Colin Groves of the Australian National University argues that there is enough variation between the northern and southern populations of this population of chimpanzees to be split into two subspecies instead of one; the northern population as "P. t. schweinfurthii" and the southern population as "P. t. marungensis".The 2007 IUCN Red List classified them as Endangered.Although the common chimpanzee is the most abundant and widespread of the non-human great apes, recent declines in East Africa are expected to continue due to hunting and loss of habitat.