warm blooded

Sanderling Calidris alba standing in a rockpool with seaweed covered stones on a beach with lots of other wading birds behind and distant sea view of a rocky coast

Sanderling Calidris alba

Stylized diagram of the duck egg showing chalaza, yolk, white, germination, membranes, and air pocket

Short eared owl Asio falmmeus in amongst vegetation icnluding grasses and ferns

Skylark Alauda arvensis ascending in flight small vignette scene with fields and heather behind

Skylark Alauda arvensis

Smew Mergellus albellus pen and ink illustration of the bird swimming on water

Snipe Gallinago gallinago perched on a slab of limestone looking forwards

Snipe Gallinago gallinago looking over its shoulder

Snipe Gallinago gallinago on the ground, cut to white

Sparrowhawk Accipiter nisus perched on top of a post with moss at its feet

Stonechat Saxicola rubicola male singing with open beak and perched in some flowering gorse Ulex

Swift Apus apus sketch in flight

Moorhen Gallinula chloropus swimming cut to white

Mute swan Cygnus olor standing on one grey leg and clearly showing its orange beak

Nightjar Caprimulgus europaeus settled camoflauged on the ground in amongst a background of birch, vetch and grasses

Northern shoveler Spatula clypeata duck pair on water

Nuthatch Sitta europaea looking alert and pointing downwards on a tree

Oystercatcher Haematopus ostralegus in amongst typical coastal plants of the Pembrokeshire coast including squill, thrift, kidney vetch, daisies, and lichen with a second bird flying behind

Peacock pavo pair with male tail on display, disintersted peahen passing by in front of him

Peregrine falcon Falco peregrinus cut to white

Pheasant Phasianus colchicus cock perched in a tree

Pheasant Phasianus colchicus cock striding on the ground with small fern and grass at his feet

Pigeon Columba livia skeleton simple line drawing