About the Eagles
The Decorah eagles are nesting near the Decorah Trout Hatchery, located at 2325 Siewers Spring Rd in Decorah, IA. The female is known as Mom and the male is known as DM2 (for the second Decorah male eagle). In general, they begin courtship in October, productive mating in late January or early February, and egg-laying in mid to late February. Hatching usually begins in late March to early April, and the eaglets fledge in mid-to-late June. While young usually disperse between August and October, the adults remain on territory year round. They eat live and and dead fish, squirrels, other birds, rabbit, muskrat, deer, possum and anything else they can catch or find. To learn more about bald eagles in general, please follow this link to the Cornell Lab of Ornithology website. Visiting Decorah to see the eagles? Please read through our guide to eagle etiquette >> Bald Eagle Etiquette.
Female eagles are larger than male eagles, with slightly darker heads and more pronounced brows. The image below shows the differences in appearance between Mom and DM2 and should help in ID’ing them.
History of the Decorah Eagles
Dad, Mom’s original mate, disappeared in April of 2018. Based on plumage color, Mom was four years old in 2007, making her fifteen years old in 2018. Click here for a guide to aging bald eagles based on plumage color and patterns.
After two other males came and went (you can read more about that here), Mom accepted a third suitor. As of December 2018, Mom and DM2 were working on nest N2B, defending the territory together, and copulating.
Nest Territory and Locations
Map of the Decorah Eagles Territory
Five nests (N0, N1, N2, N2B, and a second nest at N1) have been built on the Decorah territory. N0 was destroyed in a storm, the eagles left N1 on their own, and N2 was also destroyed in a storm. Fourth nest N2B is a little more complicated. Humans Neil Rettig and Kike Arnal built N2B in August of 2015. We hoped the starter nest would encourage the eagles to adopt it and keep building, which they did! Footage of the build can be seen here: https://youtu.be/2-xRSBBeIYs. A blog about the nest build can be read here. In 2019, a sub-adult male eagle began building a second nest at the old N1 site, sometimes referred to as N1B. We’ll see if the eagles use it for the 2019 season.
- 2018: Dad disappears in April of 2018. He is last seen at N2B on April 18, 2018. After two male eagles come and go, Mom accepts new mate DM2, for Decorah Male 2. The two begin working on N2B in October.
- 2015: N2 is destroyed during a storm the morning of July 18. In August, humans build a nest (N2B) to encourage the eagles to begin building near the former location of N2. Mom and Dad adopt N2B in October of 2015.
- 2012: Mom and Dad begin a new nest (N2) in mid-October on the north bank of Trout Creek about 700 feet from N1, which is still standing
- 2007: N0 is destroyed during a storm. Dad and OM begin building a new nest (N1) in the yard of a home just north of the hatchery. OM disappears in early fall. 2007: A four-year old female (Mom) joins Dad at N1 in early December.
- 2002’ish: the male eagle (Dad) and his original mate (OM) build a nest (N0) in the hills to the east of the hatchery
The Raptor Resource Project