Take'm all. Mix them together all the time, it's natural near me to see them that way. About the only thing I've noticed over the years is that ducks will fly over a bunch of geese to land but geese aren't fond of flying over ducks to sit down. Mid air collisions and I've seen it happen. Not a written in stone thing but they seem to follow it
First it rained, then it blew, then it frizz, then it snew --- from an oldtimers gunning boat ~~ He understood what it's about!