By Associated Press , Wire Service Content Jan. 17, 2021 (AP) - Kelly Wasenmiller was captivated from afar, tempted by photos and videos that piled up online of grizzly bear 399 and her four lined-out cubs trudging through the snow. Prairie rattlesnakes in Wyoming may leave the hibernaculum area from late April through mid-June depending upon the weather conditions. JACKSON, Wyo. (AP) - Kelly Wasenmiller was captivated from afar, tempted by photos and videos that piled up online of grizzly bear 399 and her four lined-out cubs trudging through the snow. Late spring is typically when the Western rattlesnake, the only venomous snake in Idaho, starts emerging from its den in search for food. I studied prairie rattlesnakes in Wyoming, where one den contained over 600 individuals! The prominent grizzly family was pointed north, and everyone's hunch was that they were headed into the den. Low 27F. JACKSON, Wyo. I studied prairie rattlesnakes in Wyoming, where one den contained over 600 individuals! Although you shouldn't let the prospect of coming across a rattlesnake deter you from future adventures, it's definitely important to know what to do if you do come across one. Initial movements locate Windy this evening. A Wyoming grizzly bear and her cubs continue to be a major draw for wildlife watchers, right up to when they den for the winter. In really cold climates, the ground can freeze up to 4 to 6 feet deep, and the reason there were so many snakes in one spot is probably because suitable dens sites are limited. In colder northern climates, rattlesnakes can form huge denning aggregations. A prairie rattlesnake samples the air with its forked tongue. Sunday, January 17th 2021, 10:10 AM MST JACKSON, Wyo. The prominent grizzly family was pointed north, and everyone’s hunch was that they were headed into the den.… Winds could occasionally gust over 40 mph.. Less conspicuous than the pronghorn antelope and the golden eagle is an even more ancient inhabitant of the high plains and valleys of Wyoming, the prairie rattlesnake. Those hunters often use gasoline fumes to drive the snakes from their den, and once they're caught, the reptiles become snacks or boots, or are stuffed in a striking position, fangs forever bared. In really cold climates, the ground can freeze up to 4 to 6 feet deep, and the reason there were so many snakes in one spot is probably because suitable dens sites are limited. In colder northern climates, rattlesnakes can form huge denning aggregations. A Wyoming grizzly bear and her cubs continue to be a major draw for wildlife watchers, right up to when they den for the winter. Den site fidelity is rather high. Gillette, WY (82718) Today. Their return initiates in September and they remain close to the den area during the final autumn months where they feed and bask as weather permits. 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