northern pacific rattlesnake, castella, california, usa

aggressive avoid aware band bit bite black brown brush bush california camouflage coil coiled color colour crotalus curve danger dangerous dark deadly diamond disturbed eyes fangs forked gray head herpers herpetology herps hiss hunting north northern oreganus oregon pacific panic passive pattern pit poison poisonous predator prey pupils rattle rattler rattlesnake rattlesnakes scales segments serpent shed skin slither slithered snake snakes spots stripe surprise survival tail tan tongue trail triangular under venom venomous vertical viper washington western woods