In a surprising twist that has reptile researchers buzzing, the first Western Diamondback rattlesnake ever officially recorded in Denton County was discovered in an Argyle homeowner’s garage last November — expanding the known range of one of Texas’ most iconic snakes.
Rob Boles, a local snake handler known as the area’s “snake whisperer,” made the historic find on November 6, 2025, after responding to what he expected to be a routine call. “I figured it was probably a bullsnake since those are common and often mistaken for rattlers,” Boles recalled. “But when I arrived — to my surprise — it actually was a Western Diamondback rattlesnake.”
A First for Denton County
What makes this discovery remarkable isn’t just that a rattlesnake turned up in someone’s garage — it’s that this species had never before been officially documented in Denton County, despite centuries of scientific observation.
“For decades, even hundreds of years, there have been scientists and herpetologists in Texas collecting specimens for research and making official records of the species occurring, yet there’s never been one officially recorded from Denton County,” explained Greg Pandelis, collections manager at the University of Texas at Arlington’s Amphibian and Reptile Diversity Research Center (ARDRC), which has now added the specimen to its extensive collection of 597 Western Diamondbacks from across the state. The center confirmed the snake’s identity through detailed examination.
Strange, isn’t it? The Western Diamondback is one of Texas’ most recognizable reptiles, yet somehow managed to escape scientific detection in a county that borders several others where the species is well-documented.
“This is especially odd because of how common that snake generally is,” Pandelis noted. “It’s not something that usually eludes detection.”
Scientific Significance
The three-and-a-half-foot adult rattlesnake has now found a permanent home at the ARDRC, a research museum housing over 200,000 specimens studied by scientists worldwide. Experts believe the snake likely came from a small, previously undetected local population rather than having migrated from elsewhere.
What makes the discovery particularly intriguing to researchers is the habitat. Denton County’s more wooded landscape differs significantly from the arid environments typically associated with Western Diamondbacks. “So this specimen is very important and interesting because it will reform our understanding of not just where the species occurs in Texas, but maybe even what its habitat requirements are and what its limits are, as far as where it can occur and where it can’t,” Pandelis explained.
The ARDRC has ruled out the possibility of the snake being an escaped pet, based on its condition and distinctive markings characteristic of wild specimens.
Citizen Science in Action
This discovery highlights the valuable role everyday citizens play in scientific advancement. The homeowner who spotted the unwelcome garage guest and Boles, who safely captured it, both contributed to expanding our understanding of Texas wildlife distribution.
The snake was likely seeking shelter from cooler temperatures when it found its way into the Argyle garage. After its capture, it was donated to the research center where it will continue to serve science through genetic analysis and habitat studies.
The specimen joins 403 others from surrounding Texas counties including Dallas, Jack, Parker, and Tarrant in the ARDRC’s collection. Its unexpected appearance in Denton County challenges existing distribution maps and may prompt researchers to reassess the species’ range and habitat flexibility throughout North Texas.
As for residents concerned about finding rattlesnakes in their own garages, experts at UTA advise normal precautions but emphasize that such encounters remain extremely rare — even if the scientific maps of Texas snakes now need a little updating.
