Season 4 - Episode Guide

Once again Nature's Weirdest Events has trawled the internet, raided their contact book and scoured the scientific world to unearth a treasure trove of bizarre and baffling stories. Using UGC clips of the events themselves, Chris Packham deconstructs the weirdness using eyewitness accounts, scientists and BBC archive footage. In this episode there's something strange in the water in the Caribbean, a four-foot worm in a fish tank and a tick turning America vegetarian.

Chris Packham unravels nature's weirdest events, from a crab milked for its blue blood and stones moving across the desert by themselves to a veritable swarm of rabbits.

In the UK a virgin snake gives birth, in the US a sea serpent washes up and in Morocco 12 goats stand stock still in a tree. It's a weird world, and Chris Packham explains why.