Markus Varesvuo / Hawk Owl (Surnia ulula) regurgitating pellet before eating vole prey, Helsinki, Finland, December.

Alan Murphy/ BIA / Great Horned Owl (Bubo virginianus) regurgitating pellet, Texas

Philippe Clement / Short-eared owl (Asio flammeus) regurgitated pellet containing the remains of birds and mice, Scotland, UK, May

SCOTLAND: The Big Picture / Female Merlin (Falco columbarius) coughing up a pellet, Cairngorms National Park, Scotland, UK, June.

Charlie Summers / Northern carmine bee-eater (Merops nubicus) regurgitating pellet, Selous Game Reserve, Tanzania.

Frederique Olivier / South polar skua (Stercorarius maccormicki) chick at nest site, regurgitates pellet, with parent in the foreground, Antarctica.

Ingo Arndt / Rat bait, South Georgia Heritage Trust Rat Eradication Project, South Georgia 2011

Sven Zacek / Wood sandpiper (Tringa glareola) regurgitating a pellet on the shore of a small lake in Southern Estonia.

Sven Zacek / Wood sandpiper (Tringa glareola) regurgitating a pellet on the shore of a small lake, Southern Estonia, May.

Loic Poidevin / European roller (Coracias garrulus) regurgitating pellet perched on barbed wire fence, Alentero, Spain, April.

Loic Poidevin / Common kingfisher (Alcedo atthis) regurgitating pellet, Le Teich, Gironde, France, September.

David Tipling / 2020VISION / Reed warbler (Acrocephalus scirpaceus) feeding twelve day old Cuckoo (Cuculus canorus) chick at nest and removing faecal pellet, Norfolk, England, UK, May