Complex sentence: Also, there is little to no inbreeding within the colonies since males leave the nest and mate with females from other colonies, and newly fertile females also mate with non-related males before hiding during the winter.
Split into simpler sentences: Also, there is little to no inbreeding within the colonies. This is because males leave the nest and mate with females from other colonies, and newly fertile females also mate with non-related males before hiding during the winter.