Tag Archives: Eggs

Peek inside a bald eagle egg: 24 days!

Development of an avian embryo

This blog was first published on March 23, 2017. We reposted it to give everyone a peek inside the eggs. As of this writing, there are two eagle eggs in Decorah. We’re not sure whether the oldest or second oldest egg cracked, but we do know that the youngest is about 24.5 days old, the middle is 29 days old, and the oldest is 32 days old. What do embyronic eagles look they look like as they develop and grow

Peek inside a bald eagle egg: 17 days!

A chicken embryo roughly halfway to hatch

This blog was first published on March 23, 2017. We reposted it to give everyone a peek inside the eggs. As of this writing, there are two eagle eggs in Decorah. We’re not sure whether the oldest or second oldest egg cracked, but we do know that the youngest is about 17.5 days old. What do embyronic eagles look they look like as they develop and grow inside their eggs? Dr. Peter Sharpe from the Institute for Wildlife Studies developed a

Can mice destroy bald eagle eggs?

03/13/19: A mouse under Mom Decorah's tail

Eeeek – mice! We’re getting asked whether mice could or did destroy eggs in our eagle nests. Our answer? A guarded “No”. In North America, researchers have found limited predation by mice in the nests of smaller birds, and none in the nests of birds of prey or larger birds. Researchers have been looking at nest predation for a long time. How do nest location, weather, landscape, habitat fragmentation, and predator-prey/predator-predator relationships impact predation rates? Can nest predation be reduced?

Peek inside a bald eagle egg: 11 days!

Chicken embryos roughly 25% of the way to hatch

This blog was first published on March 23, 2017. We reposted it to give everyone a peek inside the eggs. As of this writing, the first Decorah egg is 11 days, 10 hours old, the second egg is seven days, 14 hours old, and the third egg is three days, 13 hours old. What do embyronic eagles look they look like as they develop and grow inside their eggs? Dr. Peter Sharpe from the Institute for Wildlife Studies developed a table

Peek inside a bald eagle egg: 4 days!

This blog was first published on March 23, 2017. We reposted it to give everyone a peek inside the eggs. As of this writing, the first Decorah egg is 3 days, 12 hours old, the first Decorah North egg is 4 days, 19 hours old, and the second Decorah North egg is 1 day, 22 hours old.  What do embyronic eagles look they look like as they develop and grow inside their eggs? Dr. Peter Sharpe from the Institute for Wildlife

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