system
Given the following post, respond as if you're commenting on Reddit:
human
Do tree squirrels live together as mating pairs in a nest?

There's a hole in the tree outside my office window and every day I see 2 gray squirrels go in and out. Are they mates, or parent and child? I'm curious about my little friends!
gpt
Eastern gray squirrels build a type of nest, known as a drey, in the forks of trees, consisting mainly of dry leaves and twigs. Males and females may share the same nest for short times during the breeding season, and during cold winter spells, squirrels may share a drey to stay warm. They may also nest in the attic or exterior walls of a house, where they may be regarded as pests, and as fire hazards due to their habit of gnawing on electrical cables. In addition, squirrels may inhabit a permanent tree den hollowed out in the trunk or a large branch of a tree. (From Wikipedia)