[[File:BrownSpiderMonkey (edit2).jpg|thumb|left|175px|As is the case with all species of spider monkeys, the [[brown spider monkey]] is [[threatened]] by hunting and habitat loss.]]
মাকড়সা বানরেরা ১৫ থেকে ২৫ জন মিলে একটি ঢিলেঢালা গ্রুপ তৈরি করে,<ref>{{citeওয়েব webউদ্ধৃতি|url= http://www.worldanimalfoundation.net/f/SpiderMonkey.pdf|title=Spider Monkey Fact Sheet|publisher=[[World Animal Foundation]]|format=PDF|accessdate=November 10, 2013}}</ref> কিন্তু গ্রুপে ৩০<ref>{{citeওয়েব webউদ্ধৃতি|url= http://dept.lamar.edu/biology/Belize%20study%20abroad/critter%20pages%2012/Spider%20Monkey.htm|title=Spider monkey|publisher=[[Lamar University]]|accessdate= November 10, 2013}}</ref> থেকে ৪০ জন সদস্যও হতে পারে।<ref name=journal>{{cite journal |url=http://books.google.com/books?id=CbwyJ3mjzDkC&pg=PA192&lpg=PA192&dq=spider+monkeys+and+their+subgroups&source=bl&ots=VTu1j0gRRT&sig=USRiZZJUefXPYzSlkv5XgJX3PaY&hl=en&sa=X&ei=uhiAUvi5K4_9qAG4iYBg&ved=0CFEQ6AEwBQ#v=onepage&q=spider%20monkeys%20and%20their%20subgroups&f=false|author= Jennifer Anne Weghorst|title=Behavioral Ecology and Fission-fusion Dynamics of Spider Monkeys (Ateles geoffroyi) in Lowland Wet Forest|publisher=[[Washington University]]|work=Department of Anthropology|place=[[St. Louis]], [[Missouri]]|date=December 2007|pages=191–192}}</ref> এরা ৭০/৮০ ফুট গাছের মগডালে দলবদ্ধ ভাবে বসবাস করে।
