Juan Manuel Borrero / Illustration of Hirundinidae family: Common Sand Martin (Riparia riparia), Northen House-Martin (Delichon urbicum), Common Swift (Apus apus) and Barn Swallow (Hirundo rustica). Pencil and watercolor p...

Martin H Smith / Aerial view of Common seals {Phoca vitulina} on sand spit, Blakeney point, Norfolk, UK

Martin H Smith / Aerial view Common seals {Phoca vitulina} on sand spit, Blakeney point, Norfolk, UK

Martin H Smith / Aerial view of sand spit with Common seal colony {Phoca vitulina} Blakeney point, Norfolk