Great British Wildlife revival

An excellent TV show for biosphere and biodiversity, has features on cleaning up rivers, otters returning to our rivers, salmon and the battle to get them to return to the river Tyne and a feature on the animal most likely to become extinct, which is the white clawed crayfish

 

It's not the cutest or the cuddliest, but it is important to the ecosystem.  It is at risk from an alien invader the much larger American signal crayfish

It was introduced by farmers, when the crayfish escaped from the farms and spread out far and wide, they are now found in almost all areas of the UKs river network.  They also carry a plague which kills the native white clawed crayfish.