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In "Mammas," Rossellini dresses as a mother spider, wasp, hamster, toad, cuckoo, dunnock, oil beetle, piping plover and cichlid fish to show how each brings her young into the world.

There is evidence that beetle populations suffer during years when spring and summer are relatively cold and rainy, so conservationists are also concerned to see how threatened species such as the oil beetle will fare.

Then there is that queer blue oil beetle, with his queerer history; that slender-waisted wasp that digs its deep hole in the dirt, and those round holes in the path, with their mysterious hocus-pocus.

Friday March 25 2011 13:53 GMT UK hunt for the last oil beetles A nationwide hunt is being launched to find four types of oil beetle that could vanish completely from the UK countryside.

Four native species of oil beetle are now left in the UK Conservationists are asking the public to take part in the first survey of the UK's threatened oil beetles.