A community or ecosystem.
A group of similar individuals living together in an area is called population.
A group of Tigers that live together are called a pack.
A group of lions living together is called a pride.
A Pride of Lions.
A pack or group of hyenas are called a cackle.
If the group is a clone of organisms associated living together which haven't split after their formation, it's called a colony.
a 100 pile of lakes.
A group of Chipmunks is called a "sweet" of Chipmunks! Isn't that cute?!
A group of populations that live together is called a community.
A Commune
A group of horses no matter the sex can always be called a herd.If however the colt are feral horses and living together in a group they can also be called a Bachelor group/herd.
Group of one species living together is called population. Group of populations living in an area is called community. Group of populations living in an area plus the environment around them is called ecosystem.