New answers tagged sociality
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It is not trivial to define a "colony/society". Sure, you can say "this bacterial blob is a colony", or "this ant nest is a colony", and so on, but these would be your own definitions. These systems you mention don't have definite boundaries (temporal or spatial). Although physicists like to do gross approximations to things in nature (and I'm pretty sure ...
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Parakeets are social animals that live in large groups (flocks). Under ideal environmental conditions, they can form flocks composed of thousands of birds. http://www.softschools.com/facts/animals/parakeet_facts/1274/
The fact that this tree is without leaves is irrelevant to the Parakeets. They may or may not have caused it. They chose the tree as a place ...
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