Rio Mayo titi in deforestation is leading to the decrease in available living space for this titi monkey, forcing it to live in sympatry with another species of "Callicebus". Yet in some areas, such drastic deforestation has resulted in extremely high population density. The Rio Mayo titi is better adapted to moderately populated areas, thus overpopulation negatively impacts the species. The forests the Rio Mayo titi lives in are being destroyed for agricultural purposes, leaving little forest for the monkeys. They were only seen a few times and featured in museums until 2003 when more research was done on them. In order for
Ornate titi ornate titi spends a significant portion of the day sleeping. They usually spend around 60% of their time sleeping, which hugely differs from the white-tailed titi ("P. discolor"), which spends less than 25%. The ornate titi is diurnal, rising early in the morning and remaining awake and active until sunrise, however this depends on the season, due to the change in availability in food, particularly fruit, which tends to only appear in abundance in the warmer months. In contrast, an ornate titi may stay in sleeping site for up to four hours after sunrise in colder months. Usually, a titi's