Pencil illustration of the Black-Headed Gull (Larus ridibundus)

Pencil illustration of a Carrion Crow (Corvus corona)

Pencil Illustration, with added colour of an Eagle Owl (Bubo bubo)

Pencil illustration of a Tawny Owl (Strix aluco)

Pencil illustration of a Golden Eagle head (Aquila chrysaetos)

Pencil illustration of a Snowy Owl (Bubo scandiacus)