It's called Exogamy
economy
generation
clone
The founder effect
a population
Harem
A group of woodcocks is called a "fall" or a "fallen." Woodcocks are typically solitary birds except during the mating season when they form loose groups.
The group of individuals used to represent a population is called the sample. It should have the same statistics as the population, though be of a smaller size.
A group of similar individuals living together in an area is called population.
Moose are solitary animals, except for when mating or when the cow is caring for her calf or calves.
Public Relations
sample.
A colony.
Leopard don't travel in groups, they are Territorial big cats that only come together for mating season.
A group pf bees is called a colony - or a swarm (if they're outside the hive).
economy
A religious group can be called a sect. A religious group can also be called a congregation when all attend the same church. A religious group might have more than one sect, or group of individuals, like the Amish.