hey everyone

first off i have a 1.5.0 all adults housed
together in about a 48inch by 48inch screen cage.
its very well planted and heavily wooded.

so my question is
why when there is so much space to sleep in
during the day, do my cresteds almost all chose
to sleep right next to eachotehr in the same corner?
its the top right corner of the cage and they are all
suspended in the overhanging plant.

whats the deal?

at night they roam around freely but i just see this
during the day time.