unpalatable weeds

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• Daniel Janzen — Dan Janzen and Winnie Hallwachs, at the American Museum of Natural History, 1998 Daniel Hunt Janzen (born 1939 in Milwaukee, Wisconsin, U.S.) is an evolutionary ecologist, naturalist, and conservationist and the son of a previous Director of the… …   Wikipedia

• Mimicry — For other uses, see Mimic (disambiguation). Plate from Henry Walter Bates (1862) illustrating Batesian mimicry between Dismorphia species (top row, third row) and various Ithomiini (Nymphalidae, second row, bottom row) In …   Wikipedia

• Overgrazing — Overgrazed area, by native fauna in western New South Wales, in the upper right corner. . Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by… …   Wikipedia

• mimicry — /mim ik ree/, n., pl. mimicries. 1. the act, practice, or art of mimicking. 2. Biol. the close external resemblance of an organism, the mimic, to some different organism, the model, such that the mimic benefits from the mistaken identity, as… …   Universalium

• weed — weed1 weedless, adj. weedlike, adj. /weed/, n. 1. a valueless plant growing wild, esp. one that grows on cultivated ground to the exclusion or injury of the desired crop. 2. any undesirable or troublesome plant, esp. one that grows profusely… …   Universalium

• Weed — /weed/, n. Thurlow /therr loh/, 1797 1882, U.S. journalist and politician. * * * Any plant growing where it is not wanted. On land under cultivation, weeds compete with crops for water, light, and nutrients. On rangelands and in pastures, weeds… …   Universalium

• Batesian mimicry — is a form of mimicry typified by a situation where a harmless species has evolved to imitate the warning signals of a harmful species directed at a common predator. It is named after the English naturalist Henry Walter Bates, after his work in… …   Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Invasive species — See also: List of invasive species, Introduced species, Pest (organism), and Weed North American beavers constitute an invasive species in Tierra del Fuego, where they have a substantial impact on landscape and local ecology through their… …   Wikipedia

• Cirsium vulgare — Plant in flower, Fossoy, Aisne, France Scientific classification Kingdom …   Wikipedia

• Feral goat — is the name given to the domestic goat ( Capra aegagrus hircus ) when it has become established in the wild. Feral goats occur in Australia, New Zealand,Ireland, Great Britain, the Galapagos and in many other parts of the world. When feral goats… …   Wikipedia