It's not as dark as the pictures would lead you to believe; late dusk is more like it.Maybe it is just the lighting but it looks like they are still out and about after dark. Is that true? I have noticed the Young Ladies still stay up at all hours but the Princesses go to bed a good hour before it really gets dark. Do all the tribes have the same bed-time?
Tribe 1 go to roost at least an hour before the others. Tribe 3 is usually next and last, Tribe 2.
The tribes that have pro tree huggers are last in. They have already gone to roost in the trees, but I've turned up with supper and called them down. Taking tree roosting into account there probably isn't much difference in roosting times between the tribes.
Individual chickens like Donk who is usually last in stretch the roosting time by up to half an hour. Donk is a tree hugger by nature but if I'm there, she'll go into the coop without going up a tree first. Fat Bird sometimes stays out late and comes to the house when she wants escorting to the coop.