The study showed that in the wild the golden-headed lion tamarin spends about 50% of its time in only 11% of its home range. Its ranging patterns appear to be strongly influenced by resource acquisition and much less by territorial defense. The groups showed very few encounters with neighboring groups, but when it did occur, the encounters were always aggressive, and included intensive bouts of long-calling,[11] chases, and fights between the different groups.[2] The golden-headed lion tamarin spends much of its time foraging and traveling within its home range to the next foraging site.