male common european viper basking on wood stump

adder animal basking beautiful berus brown camouflage close closeup colorful common conservation creature creeping crossed danger dangereous dangerous endangered european fear fearsome frightening full gray herpetology length male nature photography poikilothermic poison poisonous predator reptile reptilian scales scary snake toxic venom venomous vertebrate viper vipera viperidae viperinae wild wildlife zoology