A joy, and surprise, to see MM swooping across the marsh, although he wasn’t too happy. A murder of Crows and one Osprey were hot on his trail. MM landed for a brief second, only about twenty feet from where I was standing. I had just arrived and struggled to get may camera out quickly, but did catch the tail end of the action. How beautiful to see his majestic wingspan. You can see his leg bands in the last few frames.
Perhaps MM simply did not want to be annoyed and that is why he flew off. Bald Eagles are very powerful and it was just last spring that either MM, or his mate, drowned a nesting Osprey.
from Avian Report – Female bald eagles have longer wingspans than males
In most birds, males are larger than females, but in most birds of prey is the opposite. The female bald eagle is larger and has a longer wingspan than the male.
Ornithologists suggest that such differences in size and wingspan allow male and female eagles to hunt prey of different sizes and avoid competition over prey of the same size.
Another line of thought suggests that females are larger to protect their eggs and chicks from larger predators and aggressive bald eagle males that may attack their chicks and female eagles.
The literature indicates that the bald eagle’s wingspan ranges between 5.11” feet and 7.7” feet. The lower end indicates the smallest males, while the upper end refers to the largest females in the range. However, most males have a wingspan of 6.4” while most females have a wingspan of 7.2” feet.