Category Archives: Mammals

Response to Humans

This gallery contains 7 photos.

Yellow bellied marmots (Marmota flaviventris) live singly, in pairs or in colonies of about 20 individuals with a single dominant male. These rodents are found in meadows, valleys and mountainous areas at various elevations (average elevation about 6,500 feet) in … Continue reading

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Early Emergence

This gallery contains 3 photos.

Depending on elevation and exposure, Oregon ground squirrels (Spermophilus beldingi) spend 6 to 8 months a year in hibernation. These rodents normally occur in natural meadows and grasslands, but readily adapt to pastures, alfalfa fields and the margins of grain … Continue reading

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Feeding California Ground Squirrel

A California ground squirrel (Otospermophilus beecheyi) sitting on rock eating looks so cute. This ground squirrel was intently enjoying his meal on the shore of F Reservoir in Modoc County CA. California grounds squirrels are mostly herbivores, although they will … Continue reading

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Microtus Runway

This gallery contains 6 photos.

  On Big Valley Mountain (Lassen County CA) the snow was about 8″ deep. While hiking near the summit recently, Leonard and I discovered two separate runways atop the snow. Each runway consisted of two entrance/exit holes about four feet … Continue reading

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Fisher Tracks

This gallery contains 6 photos.

Leonard and I spent the Winter Solstice hiking on Big Valley Mountain, a block fault mountain in Modoc County CA. Our goal was to again find bear and mountain lion tracks. We did see mountain lion tracks, but no bear … Continue reading

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Ponderosa Pine Regeneration

This gallery contains 4 photos.

Ponderosa pines (Pinus ponderosa) are considered one of the most fire resistant conifers in the west because of their seedlings’ propensity to benefit from mineral soil seedbeds and open habitats created by wildfires. This fire resistance increases as the tree … Continue reading

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Obligate Hibernation

Animals exhibit many different types of dormancy. One of them, hibernation, refers to inactivity and metabolic depression associated with low temperatures or food deprivation. Hibernation is characterized by low body temperature, slow breathing and reduced heart rate and a low … Continue reading

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