Great horned owl, golden eagle, barred owl, red tailed hawk, red shouldered hawk, northern goshawks, eagle owls, and peregrine falcons.

Yes a barred owl is nocturnal for they are also most active in the night.

There are many:

Spot-bellied Eagle-owl, Rock Eagle-owl, Brown Fish-owl, Dusky Eagle-owl, Spot-bellied Eagle-Owl, brown hawk-owl, Brown Wood-owl, Buffy Fish-owl, Tawny Fish-owl, Indian Eagle-Owl, Andaman Hawk-owl, Spotted Owlet, Forest Owlet, brown fish owl, brown wood owl, Oriental Bay Owl, Collared Scops Owl, brown hawk-owl, Indian Scops Owl, eastern grass owl, Dusky Eagle-Owl, Collared Owlet, tawny fish owl, Jungle Owlet, Mottled Wood Owl, Asian Barred Owlet, Andaman Hawk-Owl, Andaman Scops Owl, Mountain Scops Owl, Nicobar Scops Owl, Eastern Grass-owl and Nicobar Scops-owl.

yes, the barred owl does travel in groups. these groups are called oyuis.

Barred owl.