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		A Bearded Vulture (Gypaetus barbatus), a threatened species. 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...	You must be logged in to access all resource information.	More Info

		A Chilean Mockingbird (Mimus thenca), the primary vector for transmission of mistletoe (Tristerix aphyllus) to host plants in Chile. The Chilean Mockingbird (Mimus thenca) serves as the primary vector for transmission of mistletoe (Tristerix aphyllus) to its cactus host (Echinopsis chilensis) in Chile. A small proportion of the...	You must be logged in to access all resource information.	More Info

		A close-up view of Aloe vryheidensis flowers with dark-colored nectar visible. Floral nectar is offered by plants to animals as a reward for pollination. Nectar is usually clear and contains sugar and trace amounts of amino acids. Colored nectar also occurs, but is less common....	You must be logged in to access all resource information.	More Info

		A community of wildflowers growing in a restored prairie in southwestern Wisconsin. A community of wildflowers growing in a restored prairie in southwestern Wisconsin. The community pictured was open to foraging by meadow voles (Microtus pennsylvanicus), resulting in vegetation...	You must be logged in to access all resource information.	More Info

		A coral-dwelling goby (Gobiodon histrio), one of several species that coexists among coral by means of a competitive lottery. Habitat space is a limiting resource for coral-dwelling gobies. The species pictured, Gobiodon histrio, coexists with an ecologically similar species in the same genus, Gobiodon erythrospilus, by...	You must be logged in to access all resource information.	More Info

		A female green orchid bee (Euglossa viridissima) gathers floral resins from a Clusia lanceolata plant to use in brood cell construction. A female green orchid bee (Euglossa viridissima) gathers floral resins from a Clusia lanceolata plant to use in brood cell construction. A resin mass is visible on the hind leg. Almost 200 species of...	You must be logged in to access all resource information.	More Info

		*A female parasitoid wasp (Euplemus vuilletti) feeds from its host, a beetle larva (Callosobruchus maculatus).* A female parasitoid wasp (Euplemus vuilletti) feeds on its host, a beetle larva (Callosobruchus maculatus), by puncturing the beetle's cuticle with its ovipositor. The wasp creates a feeding tube to...	You must be logged in to access all resource information.	More Info

		*A female rotifer (Brachionus calyciflorus) with two eggs* A female rotifer (Brachionus calyciflorus) with two eggs. The eggs are the result of parthenogenesis, or asexual reproduction by the female, which occurs in rotifers when growing conditions are...	You must be logged in to access all resource information.	More Info

		A female silver studded blue butterfly (Plebejus argus) on a shrub in the Donana National Park of southern Spain. A female silver studded blue butterfly (Plebejus argus) on a shrub in the Donana National Park of southern Spain. P. argus has a mutualistic association with ants of the genus Lasius and uses the...	You must be logged in to access all resource information.	More Info

		A field planted with two kinds of cotton (Gossypium sp): Bt cotton and normal cotton, where the normal cotton acts as a refuge for insects. Some rows of the field in the photograph contain cotton plants (Gossypium sp) that are genetically engineered to produce a toxin from the bacterium Bacillus thuringiensis (Bt). Bt kills insects that...	You must be logged in to access all resource information.	More Info

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