description Yosemite Toad Overview
The Yosemite toad (Anaxyrus canorus) is a species of true toad endemic to the high-elevation wetlands of California's Sierra Nevada mountains, typically found above 6,000 feet. The species exhibits sexual dimorphism, with females displaying black and cream spots, while males generally have a uniform olive or gray-green coloration. It is currently listed as threatened under the U.S. Endangered Species Act, with its population declining due to chytrid fungus infection, climate change, and prolonged drought.
Conservationists monitor these amphibians as indicator species for the health of alpine ecosystems.
help Yosemite Toad FAQ
Where does the Yosemite toad live?
The Yosemite toad, Anaxyrus canorus, is endemic to California's Sierra Nevada. It uses shallow ponds, wet meadows, slow streams, springs, and shallow lake margins for breeding, and Yosemite National Park contains more than one-third of its range.
How can you tell a male Yosemite toad from a female?
Females are usually larger and have many dark spots on a pale green or light background. Males are generally yellowish green or olive with few or no spots, and adults measure roughly 1.2 to 2.8 inches long.
When do Yosemite toads breed?
Breeding begins when snow and ice melt and shallow pools form, often from spring into summer. Females lay eggs in shallow water, where tadpoles feed on algae, zooplankton, and plant material.
Why is the Yosemite toad threatened?
Habitat degradation, livestock trampling, roads, water development, and changing wetland conditions all affect the species. The chytrid fungus Batrachochytrium dendrobatidis is also a concern because it has harmed closely related western amphibians.
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