These venomous snakes are known for their speed ... severe systemic symptoms and permanent tissue damage. A juvenile saw-scaled viper can 12 mg per bite — more than twice the lethal dose ...

Instead, the horned viper will lure a migrating bird ... Future studies assessing the venom composition of juvenile snakes in parallel with their ecology are required." ...

Cottonmouths are pit vipers and have distinct physical features ... at all), while younger snakes have very bold markings. Juvenile snakes have yellowish or greenish-tipped tails.