Wildlife battered by floodwaters in southern and northern New South Wales face a long road to recovery.

Joeys washed from their mothers' pouches, waterlogged birds unable to find food and destroyed habitats are among our greatest concerns.

WIRES general manager Leanne Taylor said birds in the Clarence Valley and Northern Rivers area in northern NSW had been found suffering from malnutrition while baby birds washed out of nests were unlikely to survive.

There are also fears for animals like wombats and echidnas living in burrows likely to have drowned.

Vital food sources like grasses washed away will starve animals and expose some to predatory behaviour by feral or other native animals, Ms Taylor said.

Prolonged wet weather and the subsequent floods, have impacted wildlife from the Murray River area in the south to the far north coast of NSW and beyond.

In the south, wombats have been rescued from floodwaters while in the north, eastern grey kangaroo and red necked wallaby joeys have been orphaned.

This young 5 month old Eastern Grey Kangaroo was found alone by Julie at Backmede, the little roo was cold and wet and very vulnerable.