Markus Varesvuo / Snowy Owl (Nyctea / Bubo scandiaca) adult with chicks. One of the larger chicks is swallowing its sibling. Utsjoki, Finland, July.

Nick Upton / Tawny owl (Strix aluco) chick perched in entrance to garden nest box at dusk holding leg of a sibling in its beak, cannibalised by its mother to feed the single surviving chick, Wiltshire, UK. May.