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.

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.


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


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


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),

Click for More About Bald Eagles

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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!

April 6, 2024: Look at those clown clompers! The eaglets' feet and legs have turned orange and are growing rapidly. It won't be long before they can stand on their feet.

April 8, 2024: What are we looking forward to this week? News and NestFlix from around our Nests!

What a weekend! The second eaglet hatched at Trempealeau, a male eagle – Mr. T? – has finally started to help with brooding and stocking the pantree, and the tiny North nest bobbleheads were replaced by great growing eaglets in grey flannel pajamas. We’re looking forward to hatch at Xcel Energy’s Fort St. Vrain nest on or around April 10, hatch at the N1 goose nest next weekend, and the leap of faith a day or two later. It’s springtime

April 4, 2024: Feeding T1 at Trempealeau

Trempealeau Eagles Update

What’s going on at the Trempealeau eagle nest and where is Mr. T? We haven’t seen him since March 28. Prior to that, he and Mrs. T were exchanging incubation duties and he was acting like a normal eagle Dad. But we haven’t seen him on the nest since his last shift and no one has reported or found him, live or dead, in the vicinity of the nest. The couple’s first eaglet hatched on very late on April 2nd

March 25, 2024: DN17 and 18 eat.

Bald eagle tongues and beaks!

We know that bird beaks are specialized for feeding and daily tasks. Birds of prey have strong, curved beaks with sharp edges to help them tear meat. Falcons specialize even further, adding a tomial tooth to help them kill prey. Dabbling ducks have tiny, comb-like structures on their beaks to strain small animals, insects, and plants from water and mud, while piscivorous ducks have saw-like structures to help them hold on to struggling fish. But what about bird tongues or,

March 13, 2024: I want to reach in and remove this! Mr. North and DNF are undergoing some body molt right now, and the feathers end up EVERYWHERE!

March 13, 2024: News and NestFlix from Decorah North, Trempealeau, and the Geese!

Happy Hump Day, everyone! Before we get into the NestFlix, a quick calendar round-up: Thanks so much for all you do: for watching, sharing, learning, and especially for caring! Among many other things, we’re busy trying to document nesting peregrine falcons right now, so if you get a band number, give me an email: [email protected] Decorah North Nest March 12, 2024: Days end beauty – A lovely video with great views of Mr. North, the eggs (2:27), the nest

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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. 
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. 

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: