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How to Determine the Age of a Rattlesnake

A popular misconception is that a rattlesnake's age is equal to the number of segments on its tail. Although these snakes add a segment to their rattles with each molting, they can molt as many as six times a year. There is no definitive way to visually determine a rattlesnake's age. However, you can look for clues in the snake's appearance, from a safe distance, to estimate how old it is.

Instructions

- 1
  Photograph the rattlesnake with a color camera. Try to include a recognizable object within the frame to give a better sense of the snake's size.
- 2
  Estimate the rattlesnake's length, using objects near it as a guide. Because there are several dozen rattlesnake species, no single size guideline exists. However, a trained expert at a zoo or university can later help you estimate the snake's age after determining which species it belongs to, using your photographs. The length can help narrow down the species.
- 3
  Record details about the snake's color. A rattlesnake's skin darkens as it ages. For example, a very dark timber rattlesnake is likely an adult male.
- 4
  Document any notable patterns or markings on the snake's skin and head so you can later compare them with photographs of each species found in your area.
- 5
  Count the number of segments on the snake's tail and document its general appearance. For example, the rattle may have a smooth or blunt end. The length of the tail can immediately distinguish a very young snake -- which is born with a single, silent rattle, or "prebutton" -- from a grizzled adult.

Animals & Science