Before this encounter, I did not know that geese could have several litters in one summer. What was my surprise to see immatures staying with the juveniles without being rejected by the adults.
Indeed, I learned that the young from the first broods helped the parents take care of the chicks.
I would like to thank the Montreal Biological Society and the Longueuil Ornithology Club for teaching me this interesting fact and for giving me the opportunity to observe this behavior in nature.