Teeth are the key for biologists to understand the health of Vermont’s deer population

February 28, 2026 - 23:27

Biologists in Vermont have unlocked a powerful new tool for monitoring the state's deer population, and it lies in an unexpected place: the animals' teeth. By examining the microscopic structure of a deer's front incisors, researchers can now access a detailed biological record of the animal's life, from birth to death.

The technique focuses on the cementum, a bony tissue that coats the tooth's root. Each year, as seasons change, the growth rate of this cementum varies, creating distinct annual bands similar to the rings of a tree. By counting these bands under a microscope, biologists can accurately determine the deer's age—a fundamental piece of data for population management.

Beyond simple aging, this dental analysis reveals crucial insights into the deer's overall health and nutritional history. Periods of stress, such as harsh winters or food scarcity, leave visible marks in the cementum layers. By studying these patterns across numerous deer, wildlife managers can assess the herd's collective well-being, track the impact of environmental changes, and make more informed decisions on conservation and hunting regulations. This innovative approach transforms a simple tooth into a long-term health diary for Vermont's wild deer.