A man trying to remove oil spill from the surface of the water, USA

The thick sludge of oil covering the sea after an oil spill, Mississippi Delta, USA

Oil can be seen on beaches, rocks and the bamboo throughout the south west passage of the Mississippi Delta

A colourful tri-coloured heron wades into the shallow water along a shoreline on a bright sunny day

A colourful tri-coloured heron wades into the shallow water along a shoreline on a bright sunny day

A colourful tri-coloured heron wades into the shallow water along a shoreline on a bright sunny day

A tri-coloured heron wades in the shallows in search of food in the soft morning sun

A tri-coloured heron plunges its head into the water trying to catch fish in the shallows with its wings out

A colourful tri-coloured heron wades into the shallow water along a shoreline on a bright sunny day

A tri-coloured heron wades in the shallows searching for food with a sunny day and a reflection

A tri-coloured heron stands in front of a white background with its neck curved on a sunny day

A tri-coloured heron walks in the shallow water in search of food with a reflection of the bird