When you throw your eagle from a falconry glove at a target at the exact same time it died, it still render on your hand but in reality it's wandering around. When you take off your glove, the eagle renders where it's actually at and if it's flying, the flying animation is replaced with the leg walking animation in a sitting pose like if it were Jesus. The animations turns back to normal only when the eagle hits the ground. If you put this bugged eagle on your glove again before giving it any commands like sit, wander or follow, it will still attack salmon like if it were in wandering mode until you get it off your glove.

I show practically everything mentioned in this video, I used salmon because it dies on its own so its easier to test the bug and because I can also show that the eagle renders on your hand instead of were it is, that's why I spawned multiple salmons for the eagle to grab instead of just the one I need to cause the bug. The salmon that the eagle grabbed is the one that suddenly appeared under my hand.