The waterfowl are known collectively as "The Idiots". The chickens are known collectively as "The Other Idiots." (Actually they do have individual names, but they rarely get used.)
Mine all have there own names, I call them by there names.
When I want them to come to me as group I call in a high pitched voice " where's my girls, where"s my girls, they come like a pack of wild dogs lol. To go into the pen if I have to leave, I shake a pill bottle and they run to the pen. Smart girls my birds!
My older group is "The Clan" and the newer girls "The Posse" and Rocky the Rooster(White Plymouth Rock) well he is kind of in his own little world. While he is a little slow on the uptake he is a great protector of his girls,always on duty so he is.
Collectively known as the "Feathered Garbage Disposals". My compost pile is hurting, as they get just about every scrap.