This spotting is about brood parasitism. #1 A Koel chick opens its beak asking for food from the host parent (Yellow billed blue magpie). #2 The magpie is keeping a distance from the koel chick. #3 Magpie scared away the koel chick and moved on to entertain its own who was sitting on the same tree and was hungry too. #4 The magpie parent perched along with its own brood and started preening them.