I rarely see flocks of Ibis or Blue Heron. Usually just one bird at a time. The only time I do see them congregate in great numbers is when they are feeding or ‘taking a sun bath’,
before dusk. Very different than the ducks and the geese. Family seems to be everything for the Canadian Goose. They appear to hunt for food together. This may be similar to elephants. The young male elephants are often shooed away from the herd by the older males. Maybe there are parallels with winged birds.
Here in S.E. Michigan, within 15 miles of me there are two swamp areas with dead trees that are homes to Blue Heron rookeries.......I never knew they nested high up in dead trees until I saw them for the first time........pretty cool
Out west, the white-faced ibis (very similar to the glossy ibis out east) is a regular flocker. In fact, I detected three different flocks today in a desert riparian area while conducting a bird survey.
Also got a least bittern today in a marshy area. Hard to see but fun to watch.