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Nature's Weirdest EventsSeries 4In pictures: Some highlights from series 4

Chris Packham investigates some of the weirdest goings-on in the natural world.

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In Morocco, goats stand stock still in a tree, what exactly are they doing?

Goats climb for many reasons, but these are probably grazing high up in the branches.

  • In the Bahamas a group of pigs has learnt to swim out to passing boats to receive food.
  • A meat allergy is sweeping across the US, all thanks to this tiny arachnid – the lone star tick.
  • In the bottom of a fish tank lurks 4ft of ferocious fury – the Bobbit worm.
  • Bangkok, Thailand and a new wildlife attraction with a difference is causing a stir.
  • The tarantula hawk is a wasp that actively seeks out and attacks these terrifying spiders.
  • Whenever locals take their boats out in Havana, Illinois they run a gauntlet of thousands of jumping carp.
  • Hanging from a rope of slime, two slugs entwine before two huge blue appendages emerge – their penises.
  • Horseshoe crabs emerge from the sea every year, and are caught to be milked for their blue blood.
  • Okunoshima is an island just off the coast of Japan – and it literally swarms with rabbits.
  • For years the mystery of how rocks moved across the Racetrack Playa was unsolved – until now.
  • In Morocco, goats stand stock still in a tree, what exactly are they doing?
  • A real-life sea serpent on a Californian beach - this is an oarfish, the longest bony fish in the world.
  • A female anaconda gives birth without meeting a male in 6 years. What on earth is going on?
  • A row of zombie-like pine processionary caterpillars reaches for metres through a normal garden.

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