I don’t get what the invading female eagle wanted to do.
Did she want that nest for herself, or did she want to devour the eaglets for a meal? At first, I thought she wanted to drive the Mother Eagle out of the nest and take her place, take her mate too. Nature is a mystery. Each animal has it’s own rules.
Maybe it was her time of the month...
Years ago this pair of mocking birds would not leave my cat alone. Every time he walked across the yard they would harass him non-stop. He could not catch them so he found their nest and ate the babies. I wanted to stop it but my neighbor lady told me to let nature take it’s course.
Could be that she viewed the pair as competitors for the same food resources. Maybe she’d had a few fruitless hunts and decided that prey was too scarce to feed two families.
Or maybe she was an antifa eagle. Haters gotta hate.