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Adult & Chick Sexual Size Differences-1

Bald Eagle Biology

My measurements show that the bald eagles in our area, southern British
Columbia, generally weigh between 5 and 12 pounds (closer average 7 -11 pounds) . When I repeat this to my Alaskan colleagues they point out they have caught several 13 pound birds. And I believe they do.

I actually suspect many are seasonally bigger here as well. An eagle stuffing itself for days on end on salmon gains great weight. Most of the eagles I caught were during the summer when food was less available – and they had to work harder to get it. The general breakdown is 5 - 8 pounds for males and 8 -12 pounds for females.

It is interesting to note that in each of the first 5 years of an eagles life its wingspan gets shorter and has less width. The big soaring wings of the juveniles, so necessary to get them to their first free food, which might be 1000 miles (1600km) with minimal energy expansion -- the northern salmon runs -- get shorter and better adapted to fast maneuverable flight to match the eagles flying needs which become greatest when it has to be able to hunt within a home range to support a family. Before that it has more freedom to soar and the larger sails are obviously better adapted to that. A female just off the nest might have 6'4" wing span but at maturity it might only be 6'.

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Bald Eagle Nestling Age Classes-1

Bald Eagle Biology
Bald Eagle Nestling Age Classes

By: David Hancock:
Bald Eagle Biologist


Bald Eagle Nestling Age Classes:
(Waiting for DH photos)


Chicks- Colour/Size and Estimated Age

======================================
Class 1.
White and Small. Never left alone
for more than 2-3 minutes 1 - 10 day days
--------------------------------------------
Class 2.
Starting Grey and Small. In warm
weather left alone 1-10 minutes 1 ½ - 3 weeks old
-------------------------------------------
Class 3
Grey sit up in nest. Can be left
alone in warm weather 10-+ min. 4-5 weeks old
--------------------------------------------
Class 4
Brown feather just starting to
show in a few rows 6-7 weeks old
-------------------------------------------
Class 5
Brown feathers showing as
dominant tracks 8-9 weeks old
-------------------------------------------
Class 6
Brown and full size body:
No grey down showing. 10-12 weeks old
-------------------------------------------
Class 7
Fledglings: Uniformly brown:
Chicks fledge at 80 to 90 days of age.
==================================
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Product Donations

Wildlife News


Product Donations also Gladly Received

The Hancock Wildlife Foundation is always needing specialized, new or used equipment for which we will also issue receipts.

Camcorders, Video Editing equipment etc. For placement in nests, for upcoming school projects or testing sites. Also needed tripods etc.

Satellite Telemetry equipment: If any biologist has left over equipment we would love to use it in our upcoming eagle tracking project.

In particular we seek a sponsor who could supply high quality and high resolution cameras for the nests and other projects.

OK – here’s a Different Request: Does anybody have a spare aircraft, particularly a 2 - 4 place float plane, that they would donate for our surveys etc? I did have my commercial pilots license and would like to get back to these surveys. And of course it would support our other projects so effectively. What a dream for the Foundation and a fine way for someone to convert an aircraft, or surplus motorhome, into a full tax deduction.


A Specific Donation Needed:

Underwater or Weatherproof Video Housings needed:

The Foundation is always looking for donations of Weatherproof Housings or Underwater Housings that we can adapt to video cameras. We want them for putting in anything from eagle nests, to sitting on the bottom of rivers to sitting out in the open fields for months of exposure. Bob Chappel, our technical man on the Island, uses them in many bird nesting and school projects.


OK – here’s a Different Request:

Does anybody have a spare aircraft, particularly a 2 - 4 place float plane, that they would donate for our surveys etc? I did have my commercial pilots license and would like to get back to these surveys. And of course it would support our other projects so effectively. What a dream for the Foundation and a fine way for someone to convert an aircraft, or surplus motorhome, into a full tax deduction.



David Hancock


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A New Season and a New Look

Wildlife NewsWelcome to our new-look Hancock Wildlife Foundation web site. Over the past month or so a dedicated team of volunteers has been working toward what you are now viewing - and there is more to come. Along with the new look, we're finally getting back to the organization of the site, including getting the Biology Reference materials all into one place and organized.

You'll also notice a new banner and color scheme on our Hancock Wildlife Channel web site. Our Discussion Forum will not be changed until we have the new version of the discussion software ready for installation - likely a few weeks. At that time it too will share our new graphic logo and brighter colors.

One of the major complaints about our web presence has been that the three different sections looked so much alike that people in many cases didn't realize there were actually three different web sites with three different purposes. This caused quite a bit of a problem since all three sites also have their own "membership" database and the login info is not yet shared between them. People would sign up on one, then try to log into another and get an error message saying the system didn't know them - not good.

The three sites serve completely different yet complimentary purposes. For a look at why things are the way they are, you are invited to the Web Discussion section in our Discussion Forum. If you have time and are interested in helping, there's still lots to do and will be on an ongoing basis.
END


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Welcome to our new look

Wildlife NewsHancock Wildlife Foundation is growing and changing.

The Foundation is taking on more projects, and we're working hard to make your web experience and camera watching not only educational and entertaining, but also as easy and enjoyable as we can.

We've learned a lot over the past two seasons. We know you, our members and viewers and supporters better, and we're going to get to know you even better in the coming months and years. One of the things that has bugged people the most has been the confusion over our various web pieces. We've had a Discussion Forum topic where you've told us what you felt were the major problems, and where we've discussed some of the solutions, and where we've put together a team of volunteers to help us make things better.

Our new Home Page and the changes to our main Hancock Live Camera selection page and each of the individual nest site camera pages is a direct result of your feedback. You wanted things simpler, and with a bit of technical wizardry in some areas we think we've managed to make things at least a bit easier.

Besides the new splashy Home Page, which we'll be changing periodically to introduce the various seasons and projects that happen throughout the year, the biggest change is in the way you find and select cameras, and how the camera pages themselves work. As in the past, each nest site is the topic for articles and information about the site - and we welcome you to submit articles on your experiences with the images and information you've gained. In addition, now each camera has its own separate viewing page - linked from the main camera selection page directly. In some cases the story topic and viewing page are in fact one and the same, such as our new Haines Alaska Eagle Cam page

In other cases such as our Sidney Nest site cameras, each camera (in this case the Wide and the Close-up) have their own pages that automatically start showing you the camera - and may allow you to switch back and forth between the two (or more) views if you are viewing via Windows Media. If you have the Neokast plugin installed, you'll immediately get the camera view that way. You'll also see the usual link to Insinc for our subscription viewing.

In addition to the new camera page, we've introduced a new Biology Reference Index where we've linked in all the existing items and given you an indication of where we'll be pushing our specialist authors to organize reference works on biology, anthropology and history.

We've also simplified the top menu bar and made it the same across the main web sites. We'll be changing the discussion forum site to match both the new look and the new menu system as soon as the new version of its software is ready - very shortly.

If you have any comments, good or bad, on our changes, please feel free to post them in our Web Discussion Forum area or as comments to this posting.

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