Why are pygmy rattlesnakes often reluctant to use their venom defensively?
Answer
Venom production is metabolically costly.
Like most venomous snakes, the pygmy rattlesnake is often reluctant to use its venom unless directly handled or stepped upon because venom production requires significant metabolic resources.

Related Questions
To which genus is the pygmy rattlesnake scientifically classified?What specialized physical adaptation defines pit vipers like the pygmy rattlesnake?What is the primary characteristic of the pygmy rattlesnake's venom?How does the typical adult length of a pygmy rattlesnake compare to the Eastern Diamondback Rattlesnake?What is notable about the sound produced by a pygmy rattlesnake's rattle?What semi-fossorial behavior do pygmy rattlesnakes sometimes exhibit?Which of these snakes is listed alongside the pygmy rattlesnake as a well-known pit viper?How does hemotoxic venom primarily act on the body?Why might a pygmy rattlesnake bite sometimes result in less severe systemic effects?Why are pygmy rattlesnakes often reluctant to use their venom defensively?What is a noted pattern variation for pygmy rattlesnakes, particularly in Florida?