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The higher stoat numbers reduce the rodent population and the stoats then prey on birds. [6] For instance, the wild population of the endangered takahē dropped by a third between 2006 and 2007, after a stoat plague triggered by the 2005–2006 mast wiped out more than half the takahē in areas where stoat numbers were not limited by trapping. [7]
Scarcity during colonial history may have been due to early spread of brown rats and feral cats throughout New Zealand; a captive bird showed alarm at the presence of a cat. Final extinction coincided with the first expansion of stoats on the West Coast Region, before the wetlands were drained for farming. [87]
The stoat is the product of a process that began 5–7 million years ago, when northern forests were replaced by open grassland, thus prompting an explosive evolution of small, burrowing rodents. The stoat's ancestors were larger than the current form, and underwent a reduction in size as they exploited the new food source.
The following is a list of species (or subspecies) in the Mariana Islands, defined by the International Union for Conservation of Nature (IUCN) Red List or by the U.S. Fish & Wildlife Service (USFWS), as being extinct, critically endangered, endangered, threatened, vulnerable, conservation dependent, or near threatened.
The near extinction of the formerly widespread South Island takahē is due to a number of factors: over-hunting, loss of habitat and introduced predators have all played a part. The introduction of red deer (Cervus elaphus) represent a severe competition for food, while stoats (Mustela erminea) take a role as predators.
The Atlantic Ocean is teeming with life, but for the first time researchers have discovered dead zones in these waters - areas low in both oxygen and salinity - off the coast of Africa. Fish can't ...
Richardson's stoat M. r. richardsonii. Bonaparte, 1838 Similar to M. r. cigognanii, but larger, with a dull chocolate brown summer coat [10] Newfoundland, Labrador and nearly all of Canada (save for the ranges of other American stoat subspecies) imperii (Barrett-Hamilton, 1904) microtis (J. A. Allen, 1903) mortigena (Bangs, 1913) Baffin Island ...
More than 80% of ships are speeding through "go slow" zones set by environmental regulators along the U.S. East Coast to protect endangered North Atlantic Right Whales, according to a report ...