sentence: Tests show that warning colours definitely do deter predators.
sentences_before: Along with the colour and behaviour often goes the foul smell of their chemical weapons. Noxious caterpillars often have thick, leathery cuticles which help them to resist young birds making a 'test'. When the bird takes a peck, disgusting fluid seeps out from special glands on its back. Kegan Paul, London. All in all, the predator is given good warning.
concept_name: test
headings: Warning colouration
categories: Co-evolution Ecology