Canada Goose

This is an abundant bird species found in Iowa, often found in mowed areas near streams, lakes and ponds. These birds are social and found in large flocks, often times they are related to members of the flocks they travel in. Canada geese mate for life, having 2 to 8 young a year.

https://www.allaboutbirds.org/guide/Canada_Goose/lifehistory