Female howler monkey (Alouatta palliata palliata) uses a canopy bridge in Playa Hermosa, Costa Rica with an ingenious design to support prehensile tail use.

Now, every day, a howler monkey is electrocuted using cables and ... showing hierarchy to their alpha female, the paternal care of the alpha male towards young, dispersing pollen from flower ...

The red howler species is the most common, but it is often targeted by hunters eager for bushmeat. Other species of howler monkey may be critically endangered over sections of their ranges.

Right: Vaccination of a howler monkey in Santa Catarina ... died from pneumonia during the acclimation period, and a young female was returned to CPRJ after being ostracized from the group ...