A fun nest to photograph, and in a natural cavity. On this day the parents found a motherload of whatever that is in the bill and kept coming back and back again with their bills full of these lime-green insects to feed their brood with.
Canon 7DII + 500mm f/4 II + 1.4TC III, manual exposure, evaluative metering, 1/320s., f/5.6, ISO 800, natural light, handheld, FF.