Challenges of Incubation

Resource for Grades 2-6

WNET: Nature
Challenges of Incubation

Media Type:
Video

Running Time: 3m 21s
Size: 21.0 MB

or


Source: Nature: "American Eagle"

Learn more about the Nature film "American Eagle."

Resource Produced by:

WNET

Collection Developed by:

WNET

Collection Credits

Collection Funded by:

Booth Ferris Foundation

It’s not easy being an eagle. This video from Nature illustrates the early stages of the egg incubation process for an eagle couple along the Upper Mississippi River. With help from an onsite video camera, researchers can view the entire incubation period for two eagle eggs. During this period, the video footage captures the female eagle as she lays an egg, the careful nature of the male eagle with the young eggs, the quick response the parents have towards perceived danger, and how the couple copes with a deadly winter storm.

open Discussion Questions

  • Describe the dangers eggs face in the nest.
  • What do the eagle parents need to do to keep the eggs safe?
  • Who does the work to protect the eggs?
  • How long is the incubation period?

open Transcript

Narrator: The young female lays her quarter-pound egg before dawn.

Exposed, an egg can freeze in a minute. And so the father will need to move in for his first shift.

Bob Anderson: The first egg was laid early in the morning. We actually missed it. We saw the birds sitting in the bowl and we knew it would be soon. But we were kind of surprised to see this first egg. But we can see him, how careful he is with his feet. His feet are balled up, and he’s trying to hide his talons. He doesn’t want those nails to poke a hole in that fragile egg. And it’s touching to watch that sensitivity that this old guy has had with many, many eggs, probably, in his lifetime.

If a second egg is coming, it’s due two days after the first.

Anderson: C’mon, stand up. She looks like she’s about ready to stand up, but…What do we have? We have two eggs!! We’ve got two eggs, see this, see ‘em both. Ha ha.

Neil Rettig: So you feel like a papa?

Anderson: When they hatch I’ll feel like a papa. Now we just have to wait 35 days from today to see our first baby.

Narrator: If eagles can feel pride or joy, the new parents must be brimming over. They will now work nearly unbroken shifts, but even such an effort can’t guarantee that the eggs will hatch safely – especially since they must survive one of the longest incubations of any bird along the Upper Mississippi.

Egg thieves abound. Raccoons and crows are everywhere. So each parent is highly attuned to any sight or sound of menace.

And then – another storm.

Anderson: We knew a storm was coming and we really wanted to see the first reaction of the birds waking up, covered in snow. So we made sure we had our recorders running long before daylight. I was at first disappointed we had snow on the lens, but it just shows how ugly the conditions really, really are. I mean, this bird’s covered in snow. And she’s screaming right now, at the male, going, “Come and relieve me. Come and take my place." And he does.

The speckle-headed female finally proves herself… and the devoted father knows his job.

With a little luck, the eggs will hatch in another week.


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