Here in Minnesota we do things a little different sometimes. Let me splain. First, a little background.
Bird parental investment is intense, or at least it can be. You all know the stories. A bunch of carp are regularly fed in a pond, so they learn to come to the edge of the water when they detect a presence there, and stick their big round mouths out of the water to beg for bits of bread. A mother or father bird has just started to feed the little hatchlings, who beg for food with their gaping maws. A windstorm. A weakened branch. Some bad luck. The bough breaks and the nest, with baby and all, comes down. The rats and cats feast.
The next day the disoriented parent bird happens by the pond and triggers the mouth-gaping begging of the carp. The bird is cued into action and finds a morsel of food for the fish, and the fish respond with more gaping, and the parent bird responds with more feeding. This goes on for a while until the hormones wear off and the bird goes on to other things.
A pair of bald eagles are nesting with a web cam in Minnesota. One of them killed a duck and brought it back to the nest. In case you were wondering, raptor style birds eat a lot of other birds, so that is not especially odd. Anyway, they ate the duck but the duck was about to lay an egg, which was inside her. The egg fell out. Normally, a hungry eagle would have just eaten the egg along with the rest of the duck, but in this case, the nesting, would be parental eagles, chose to nurture it instead. They moved the egg into the center of the next and are trying to hatch it.
What could possibly go wrong?
Hat tip: Jaf.