Editing Howler monkey (section)

=== Sleeping ===
Howlers use the upper-middle part of their sleeping tree and use large branches on the 70% of nights that potentially allow for grouped sleeping or resistance to weather conditions and risk of branch breaking. Their sleeping sites are  usually close to  morning feeding sites.<ref>{{cite journal |last1=Brividoro |first1=M.V |last2=Kowalewski |first2=M.M |last3=Scarry |first3=C.J |year=2019 |title=Patterns of Sleeping Site and Sleeping Tree Selection by Black-and-Gold Howler Monkeys (Alouatta caraya) in Northern Argentina. |url=https://doi.org/10.1007/s10764-019-00094-x |journal=Int J Primatol |volume=40 |issue=2019 |pages=374–392|doi=10.1007/s10764-019-00094-x |s2cid=190648043 |url-access=subscription }}</ref>