Dinner is served

These are juvenile Tree Swallows waiting for their parent to feed them. When parent birds see their chicks with mouths agape, it triggers their instinct to feed them. The visual cue of the open mouth combined with the baby’s loud calls stimulates the parent to regurgitate food from their crop to feed the chicks. Regurgitation is how parent birds feed their young, especially in the first few days after hatching. Chicks that gape the widest and beg the loudest tend to get fed first and most often.

OM-1 Mk II, OM 150-400mm

Adobe Lightroom