4 years after building a pool in his garden, photographer captures award-winning image of frog embryo inside an egg using special probe lens

Close-up image of a developing amphibian embryo inside a translucent egg in dark surroundings.

Experiencing new life developing in front of the lens is a moment few ever encounter. For photographer and biologist Julian Terreros-Martin, that opportunity came unexpectedly – and has now earned him one of the UK's most prestigious wildlife photography awards.

Terreros-Martin's striking image shows a developing embry of a common frog (Rana temporaria) inside a translucent egg – a rare glimpe into early life stages of amphibian development. The image was awarded a prize in the Hidden Britain category of the British Wildlife Photography Awards.