The Bearded Vulture (Gypaetus barbatus) is a threatened species. Many conservation programs aim to increase population size by improving survival and reproduction; however, density dependence may...
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A juvenile Marbled Murrelet (Brachyramphus marmoratus) sits on its nest platform high in an old-growth Douglas fir. The Marbled Murrelet is an endangered seabird. A recent study used age-ratio...
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An adult male valley elderberry longhorn beetle (Desmocerus californicus dimorphus) perches on a leaf of its host plant, blue elderberry (Sambucus mexicana). Although classic metapopulations are...
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The southern torrent salamander (Rhyacotriton variegatus) inhabits small, cool, headwater streams and seeps in conifer-dominated forests, primarily in the Coast Ranges of Oregon and northern...
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The Iberian lynx (Lynx pardinus) is a carnivorous mammal that was once common on the Iberian Peninsula, where its preferred habitat is scrub vegetation and Mediterranean woodland. The species...
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To investigate how species, communities, and habitats change over the rural-urban (or pristine to human-dominated) gradient students conduct a series of biological inventories, field measurements,...
Juvenile loggerhead sea turtle (Caretta caretta) in a plastic pail in South Carolina. Loggerheads are an endangered species, populations of which are declining in part due to human interference with...
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Photo of a hatchling loggerhead sea turtle (Caretta caretta) on a beach in South Carolina. Female loggerheads lay their eggs on land and juveniles, such as the one pictured here, migrate from the...
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Photo of a hatchling loggerhead sea turtle (Caretta caretta) entering the surf on a beach in South Carolina. After hatching, juvenile sea turtles are guided to the ocean by celestial light...
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