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The moors are a northern stronghold for the adder, but seeing them requires stealth. Sanjida O'Connell has come out early with Janet Cannning from Natrual England to see these secretive creatures. The more gently you walk the better chance of seeing them. Tread carefully - adders are poisonous and are sensitive to the vibrations of your footsteps. You'll find them on south-facing paths being warmed by the sun, and once their bodies have reached working temperature they'll be off so you haven't got much time to work out if it is a boy or a girl. The males are smaller than the females and are more highly coloured, with a grey-blue-brown darker diamond on their back. The females have a brown zigzag on their back and a straw yellow colour, so they blend in more with the grass. Surveys show that there are several hundred adders on the moors, making this an adder hotspot. On some days Janet has seen 12 adders on her walk.