Kittiwake gathering nesting materials

Kittiwake gathering nesting materials

Kittiwake gathering nesting materials from grass embankment at Crawton, Aberdeenshire.

Northern gannet drying wings

Northern gannet drying wings

Gannet (Morus bassanus) drying wings at Troup Head, Scotland.

Black backed gull with chick

Black backed gull with chick

Black backed gull with chick, Isle of May, Scotland

Northern gannet (Morus bassanus) with young

Northern gannet (Morus bassanus) with young

Northern gannet (Morus bassanus) with young at Troup Head, Scotland.

Black grouse (Tetrao tetrix) males fighting at a lek in Scotland, monochrome image.

Black grouse (Tetrao tetrix) males fighting at a lek in Scotland, monochrome image.

Black grouse male attacking another on the ground fighting at a lek in Scotland, monochrome image.

Mute swan taking off at Loirston Loch nature reserve, Aberdeen

Mute swan taking off at Loirston Loch nature reserve, Aberdeen

Mute swan taking off at Loirston Loch nature reserve, Aberdeen, Scotland

Northern gannet (Morus bassanus) collecting nesting material

Northern gannet (Morus bassanus) collecting nesting material

Monochrome image of gannet (Morus bassanus) in flight after collecting nesting material at Troup Head, Scotland

Arctic tern (Sterna paradisaea), Isle of May, Scotland

Arctic tern (Sterna paradisaea), Isle of May, Scotland

Arctic tern (Sterna paradisaea) at Isle of Mull, Scotland

Black grouse (Tetrao tetrix) males fighting at a lek in Scotland, monochrome image.

Black grouse (Tetrao tetrix) males fighting at a lek in Scotland, monochrome image.

Male black grouse fighting at a lek in Scotland, monochrome image in square format.

Black grouse (Tetrao tetrix) female at a lek in Scotland, monochrome image.

Black grouse (Tetrao tetrix) female at a lek in Scotland, monochrome image.

Black grouse (Tetrao tetrix) female at a lek in Scotland, monochrome image.

Northern gannet (Morus bassanus) flying

Northern gannet (Morus bassanus) flying

Northern gannet (Morus bassanus) flying at Troup Head, Scotland.

Northern gannet (Morus bassanus) flying

Northern gannet (Morus bassanus) flying

Northern gannet (Morus bassanus) flying at Troup Head, Scotland.

Northern gannet (Morus bassanus) landing

Northern gannet (Morus bassanus) landing

Northern gannet (Morus bassanus) landing at Troup Head, Scotland.

Black backed gull with chick

Black backed gull with chick

Black backed gull with chick, Isle of May, Scotland