Chat Moderators > Decorah Eagle Mods Want You To Know -- Eagle Education

Bald Eagles Fact of the Day

<< < (21/21)

Tails are integral to bird flight and are comparable to the rudders of ships and boats.  They help birds steer and maneuver while flying, as well as provide stability as they take-off and land.  By twisting its tail, the bird can change its direction mid-flight.  To help the bird slow down, the tail flares out downward, creating more drag and decreasing the bird's velocity.  While the bird is soaring, it can spread out its tail feathers behind it to create additional lift and stability. 

There are 12 tail feathers, formally called rectrices or retrices.  They measure between 11-16 inches in length.  The two center tail feathers are called Deck feathers because they are slightly raised. To minimize flying problems, wing and tail feathers usually molt symmetrically so that matching feathers from the right and left sides fall out at approximately the same time.

Dispersal is defined as the purposeful movement away from population centers that serves to separate individual members of avian populations in one area.  Juvenile bald eagles generally leave their natal nest area and begin their adventure when they are no longer dependent on their parents for food.  The results are a mixing of individuals hatched at different locations.  Frank Gill states that large natal dispersal distances can unite populations while small natal dispersal distances may enhance genetic isolation.  Dispersals are often undertaken by recently fledged birds and serve to increase population ranges and reduce population densities so that the birds that disperse are more likely to survive and reproduce than those who do not disperse.

July 3, 2020

For our final Bald Eagle Fact of the Day post in the forum, I'd like to recommend some birds of prey books for you to read while chat is closed. I hope this makes the time go faster for you and that you enjoy reading them as much as I did.

Hawks, Eagles and Falcons of North America by Paul A. Johnsgard

Majestic Eagles by Stan Tekiela

Raptors the Birds of Prey by Scot Weidensaul

Just Eagles by Alan Hutchinson and Bill Silliker Jr.

How Fast can a Falcon Dive? by Peter Capainolo and Carol A. Butler

A Season with Eagles by Dr. Scott Nielsen

Understanding the Bird of Prey by Nick Fox

The Bald Eagle by Mark Slalmaster

The Bald Eagle Haunts and Habits of a Wilderness Monarch by Jon M. Girrard snd Gary R. Bortolotti

Bald Eagle Fact of the Day  :) :) :) - Welcome Back!

RRP begins re-streaming their eagle cameras today, October 8, 2022.

You can watch here for the Decorah Hatchery Nest pair that seem to have taken up the N1 starter nest -

Please join to chat from 12 to 3 Central at the old Decorah hatchery link. We surely hope for views of the new incredible pair HD and HM that have graced our presence in 2022 but seeing all of you is the best!. 

The Decorah North Nest will be streamed here starting at 12 noon CT also -

Chat at DNN today is scheduled from about 2 pm to 4 pm CT.

Let the nest rebuilding begin !!!

We will continue to miss "our" Mom Decorah and DM2 but the boots on the grounds reports have let us know that they are safe and rebuilding.  We wish for their safety with every fiber of our beings!


[0] Message Index

[*] Previous page

Go to full version