endothermic

Pochard Aythya ferina pair with male with rusty head and female on one leg with head nestled into her chest

Puffin Fratercula arctica standing on tufts of grass facing left

Raven Corvus corax cut to white

Red grouse Lagopus lagopus

Red grouse Lagopus lagopus cut to white

Red grouse Lagopus lagopus standing on limestone boulder with a pale upland morr landscape behind, small vignette

Red kite Milvus milvus in flight from below showing its distinctive v shaped tail

Red throated Diver Gavia stellata looking alert with red throat on show, showing striped head and sharp beak

Reed warbler Acrocephalus scirpaceus perched in amongst a thicket of reeds peering down

Kestrel Falco tinnunculus perched on a tree stump looking out at the viewer

Kestrel Falco tinnunculus hovering in flight, focusing on the land beneath

Kingfisher Alcedo atthis sketch of bird in flight

Lapwing Vanellus vanellus showing crest, irridescent plumage and with a tuft of grasses at its feet

Linnet Linaria cannabina on a branch showing its distinctive red head and crimson cap

Little owl Athene noctua sat on a tree stump on one leg with ash leaves behind, staring out balefully

Little tern Sternula albifrons flying over a beach with marram grass on dunes, shingelo behind, and distant hills on the horizon

Long tailed tit Aegithalos caudatus clinging to a branch and looking very fluffy with long black tail and distinctive pinkish feathers

Magpie Pica pica perhsed on a branch with the irridescent green in its blue and green feathers echoed by branble leaves and other foliage behind it, very white chest and wing bars.

Mallard duck Anas platyrhynchos female with four inquisitive ducklings, pen and ink drawing with the mother duck facing right and the four ducklings busy exploring behind her.

Mallard duck Anas platyrhynchos pair on water cut to white

Mallard Anas platyrhynchos fledgling with moulting feathers on grass

Mallard Anas platyrhynchos ducklings foraging on grass under the watchful eye of their mother with distinctive blue speculum

Two juvenile fledgling mallard ducks in a grass field, quacking

Mallard Anas platyrhynchos ducklings with food and a flat dish with water and marbles in to teach bred ducklings to dabble without fear of drowning