January to March wildlife highlights:

Yellow wagtails on D reservoir walls:

Otter teaching cub to hunt by J Turner:

Otters on the river Hull:

Otters on ice by Roy Vincent:

Introduced marsh / pool frogs on North Lagoon:

Stoats living in the roof of the old wildlife centre:

Corncrake - a very rare sound in the Hull Valley:

Otters on BBC Inside Out (reproduced under permission):

Grasshopper warbler:

Bittern on North Marsh by Dave Ruffles:

The aberrant orange woodpecker

Tophill Low in 1966 - 'On Tap'