B C B C How Adders Look 4 Where Adders Live 10 Hunting and Feeding 14 Glossary 22 To Learn More 23 Index 24 4 Adders are small venomous snakes They are the only snakes that can control how much venom they release Adders weigh up to 4 pounds 1 8 kilograms They are between 12 and 36 inches 30 and 91 centimeters long 
