Trempealeau Eagles

Welcome to the Trempealeau Eagles’ Nest! We hope you enjoy watching and learning with us! Click the livestream to watch and scroll down the page to learn more about the eagles and their surroundings.

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About the Trempealeau Eagles

About the Eagles

The Trempealeau eagles are nesting on private property in the city of Trempealeau, Wisconsin. Their nest is located in a white pine tree overlooking the Mississippi River. In general, the eagles 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.

The eagles eat live 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.

Adults

For now, we’re referring to the eagles as Mr. and Mrs. T. If that changes, we’ll let everyone know!  

Nests

This is the only nest at this site, although others can be seen nearby. The eagles have occupied this nest for at least five years. It is roughly 65 feet off the ground. 

Quick facts
Common name: Bald Eagle
Scientific name: Haliaeetus leucocephalus
Length: 2.3–3.1 feet | 71–96 cm
Wingspan: 5.9 – 7.5 feet | 1.7-2.2 meters
Weight: 6.5 – 13.8 pounds | 3–6.3 kilograms
Lifespan: Up to 40 years in the wild

Bald Eagle Vocalization

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Learn More About Bald Eagles

April 19, 2024: DN17 and DN18

Eaglet Growth and Development: Week Four

We’re writing a series of blogs about the first few weeks of an eaglet’s life. An eaglet spends roughly 75 to 80 days in the nest. For about the first half, it grows and gains weight. For about the second half, it grows flight feathers and starts developing the skills it will need post-fledge. We will focus on week four in this blog. During week three (fourteen to twenty-one days), the dynamic duo shed most of their natal down, gained

2024: 0629-44094, aka Ma FSV. She is 22 years old and fledged from a still active nest about 45 miles east of this one.

Bald Eagles, Menopause, and Ova

Do bald eagles go through menopause? Probably not, since we’ve documented menopause or prolonged post-reproductive lifespans in just four species.

Feather Follicle

What are feathers? What is molt?

Eaglets go through two molts and three feather stages in the nest: natal down (and molt), followed by thermal down (and molt), followed by juvenile feathers. As of this blog, the Decorah North eaglets are shedding the very last of their natal down and their thermal down is rapidly being replaced by juvenile down and feathers. We thought we would blog a little more about feathers to celebrate!  When we think about feathers, we tend to think about their qualities

April 14, 2024: The last gosling hatches at N1.

Canada Geese: Precocial versus Altricial

As watchers know, Canada geese are nesting in two abandoned bald eagle nests in Decorah, Iowa. N2B – currently a goose nest – is located about 700 feet east of N1, where geese started hatching yesterday. This blog discusses some of the differences between altricial eagles and precocial geese!  Altricial eaglets rely on parental care until they fledge. But goslings are precocial: capable of moving around, self-feeding, and leaving the nest shortly after hatch. What does that mean? Read on

April 6, 2024: Sleeping - and dreaming! are part of eaglet growth and development.

Eaglet Growth and Development: Week Three

We’re writing a series of blogs about the first few weeks of an eaglet’s life. An eaglet spends roughly 75 to 80 days in the nest. For about the first half, it grows and gains weight. For about the second half, it grows flight feathers and starts developing the skills it will need post-fledge. We will focus on week three in this blog. DN17 and DN18 turned 15 and 14 days old today. During week two (seven to 14 days),

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News

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July 7, 2024: DN18? I think so, given the white. DN18 has more white feathers than DN17.

July 8, 2024: NestFlix and News from the North Nest and Trempealeau!

We’ve got NestFlix from the North Nest and Trempealeau! The eaglets at both places are learning about life beyond the nest and stretching their wings – literally – as they learn by soaring, chasing, perching, landing, and taking off. Eagle college is a few months away, but it’s best to start preparing now, since the professors are not as acoomodating as Mt. North, DNF, and the Ts. I loved all of these videos, but I especially liked TE2 in front

June 26, 2024: The limb and nest on the ground beneath the tree.

June 26, 2024: News from the North Nest and Trempealeau

The rest of the North nest collapsed this morning when the limb holding it broke at 5:03 AM. Our camera operators gave us a glimpse of the limb on the ground and we’re quite curious to assess the state of the tree as a whole. In the meantime, we’ll keep watching the eagles! The entire North family is doing well and we watched them across the pasture today. It looks like AP placement for DN17 and DN18 in Outdoor School

June 23, 2024: The nest's framework makes a most unusual pillow for DN17!

June 24, 2024: NestFlix and News from Decorah North, Trempealeau, and the Mississippi Flyway!

We saw a real tug-o-fish today as DN18 and DN17 scrapped over a small trout that DNF brought in. Note that DN18 used his eagle table manners – gorging everything but one bite down quickly. No one can steal it once it’s down the hatch…exception here: https://lauraerickson.substack.com/p/parasitic-jaeger-in-july! Fledge and post-fledge activities are going on at all of our eagle nests right now and several people have expressed concern that the fledglings aren’t being fed. It’s common for feedings to decrease

DN17 at the North Nest: growing, learning, and adapting. I love this stage of eagle life!

June 21, 2024: NestFlix and Chill!

Thank you from the bottom of our hearts for supporting our fledge fundraiser. You donated $16,000 dollars to support our education and research work yesterday, which is amazing! Your donations keep cameras streaming, scopes trained on peregrine falcon bands, autumn banding stations open, classrooms learning about bald eagles and peregrine falcons, and so much more! So again, thank you – and a special shoutout to our volunteers for a wonderful day. John and I had a great time chatting and

April 15, 2024: Natal down mohawks, thermal down bodies.

April 15, 2024: NestFlix and News From Decorah North, the Trempealeau eagles, and N1

Time to Nestflix and chill! At Decorah North, our grey grey tweagles are eating fish tails, sprouting pinfeathers and mohawks, coughing up pellets, and making all of their milestones! At Trempealeau, Mrs. T brings in an impressively large suckerfish and she and Mr. T defend the nest from a barred owl. The geese jumped this morning. Five of the six survived and the little family paddled downstream this morning. Perhaps we’ll see them below N2B or at the hatchery pond!

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Nest Records
Trempealeau Eagles 2024 Nesting Record
Egg Laying
Mrs T. laid her first egg on Sunday, February 25, at 6:05 PM CT. 
Mrs. T laid her second egg on Thursday, February 29 at 5:36 PM CT. 
Hatching
We’re guesstimating that hatch will happen on Thursday, April 4, but this is our first year of data and it could be a little earlier or a little later. 
Fledging
TBD

Eaglets and Outcomes: Detailed Annual Information

Year Nest Parents Eaglets Known Outcomes
2024 T1 Mr. T, Mrs. T None Mrs. T has laid one egg so far.

We often get questions about where the eaglets go after they disperse. We have never tracked eaglets from this nest, but we have tracked eaglets from the Decorah nest. For more information, visit our eagle maps.

Trempealeau Eagles Video Library

Trempealeau Eagles Video Library

Click the hamburger icon on the top right of the video below to view a full list of videos from our most recent playlist, or visit our youtube channel here: https://www.youtube.com/c/RaptorResourceProject.