Show Navigation
Cart Lightbox Client Area
1 of 1

Bald eagle migration research - 10

Add to Cart Add to Lightbox Download

Rachel Wheat, a graduate student at the University of California Santa Cruz uses calipers to take length and depth measurements of the beak of a bald eagle (Haliaeetus leucocephalus) captured in the Alaska Chilkat Bald Eagle Preserve. In this photo she is determining the culmen length. Beak measurements and toe claw (hallux) length are two measurements that help determine the gender of a bald eagle. Female bald eagles typically have larger beaks, feet and talons. This reversal of gender size is called reverse sexual size dimorphism. Wheat is conducting a bald eagle migration study of eagles that visit the Chilkat River for her doctoral dissertation. She hopes to learn how closely eagles track salmon availability across time and space. The bald eagles are being tracked using solar-powered GPS satellite transmitters (also known as a PTT - platform transmitter terminal) that attach to the backs of the eagles using a lightweight harness. The latest tracking location data of this bald eagle known as "2Z" can be found here: http://www.ecologyalaska.com/eagle-tracker/2z/ . During late fall, bald eagles congregate along the Chilkat River to feed on salmon. This gathering of bald eagles in the Alaska Chilkat Bald Eagle Preserve is believed to be one of the largest gatherings of bald eagles in the world.

Filename
Bald eagle migration research - 10.jpg
Copyright
© John L. Dengler
Image Size
8256x5504 / 14.7MB
https://www.photoshelter.com/support/license
https://archive.denglerimages.com/p/licensing
Contained in galleries
Bald eagle research - Chilkat River eagle migration study
Rachel Wheat, a graduate student at the University of California Santa Cruz uses calipers to take length and depth measurements of the beak of a bald eagle (Haliaeetus leucocephalus) captured in the Alaska Chilkat Bald Eagle Preserve. In this photo she is determining the culmen length. Beak measurements and toe claw (hallux) length are two measurements that help determine the gender of a bald eagle. Female bald eagles typically have larger beaks, feet and talons. This reversal of gender size is called reverse sexual size dimorphism. Wheat is conducting a bald eagle migration study of eagles that visit the Chilkat River for her doctoral dissertation. She hopes to learn how closely eagles track salmon availability across time and space. The bald eagles are being tracked using solar-powered GPS satellite transmitters (also known as a PTT - platform transmitter terminal) that attach to the backs of the eagles using a lightweight harness. The latest tracking location data of this bald eagle known as "2Z" can be found here: http://www.ecologyalaska.com/eagle-tracker/2z/ . During late fall, bald eagles congregate along the Chilkat River to feed on salmon. This gathering of bald eagles in the Alaska Chilkat Bald Eagle Preserve is believed to be one of the largest gatherings of bald eagles in the world.