The Lupine Wavelength Haemovariform had a humanoid body which resembled a bipedal wolf, but could also run on all fours. Haemovariforms had very sensitive ears. It had fur which covered its body and a wolf-like head, as well as a tail. Their vision was monochromatic. Haemovariforms were highly resistant to bullets and they were able to be made to think that they were allergic to mistletoe. The only known way to kill a Haemovariform was over-exposure to the moonlight on which they thrived, like a plant in relation to sunlight, though the Doctor indicated that silver bullets would work as well. Their sharp, vicious teeth and claws were capable of ripping people to pieces. (TV: Tooth and Claw)