Vertebrate animals, generally large, with skin covered by hair and large brain cavities. Females have mammary glands for feeding the young, who are usually born quite mature.
Nonindigenous mammal distribution information [ More info] Descriptions of mammals and examples of the deleterious effects of nonindigenous species, with links to distribution maps, species lists and related information on mammals.
Noninvasive methods for monitoring bear population trends [ More info] We estimate population growth rates by collecting hair at natural bear rubs along trails, roads, and fence and power lines, and analyzing the DNA from the hair.
Northern Divide Grizzly Bear Project [ More info] Project to assess the grizzly bear population size, trend, and survival in the Northern Continental Divide Ecosystem (NCDE) in Montana to improve the long-term survival for this threatened species. With description, DNA identification means and photos.
Pacific Walrus Response to Arctic Sea Ice Losses [ More info] Radio-tracking indicates that walruses will exploit sparse ice to maintain access to preferred foraging areas over the continental shelf.
Plague [ More info] History, pathology, and prospects for this historic disease that is still prevalent in animals and remains a threat to humans.
Polar Bear research at the Alaska Science Center [ More info] Ecological studies of polar bears including population dynamics, dependence on sea ice, and tracking methods.
Polar bear and walrus response to the rapid decline in Arctic sea ice [ More info] The Arctic is warming faster than other regions of the world due to positive climate feedbacks associated with loss of snow and ice. The USGS has modeled the future responses of polar bear and Pacific walrus populations to this environmental change.
Pollinators, plants, and prosperity [ More info] Six short news articles about ecological problems faced by pollinator species in various parts of the US. Taken from "People, Land, and Water", the newsletter of the Department of the Interior.
Prehistoric packrats piled up clues to climate change [ More info] Hoarding behavior preserved prehistoric materials we can use as clues to ancient climate and ecosystem changes.
Protecting black-footed ferrets and prairie dogs against sylvatic plague [ More info] Development of vaccines and methods to deploy them, to reduce the threat of this serious illness on the population of these wild animals.
Alphabetical Index of Topics
a b c d e f g h i j k l m n o p q r s t u v w x y z