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A bird atlas is an ornithological work that attempts to provide information on the distribution, abundance, long-term change as well as seasonal patterns of bird occurrence and make extensive use of maps. They often involve a large numbers of volunteers to cover a wide geographic area and the methods used are standardized so that the studies ...
The seventh edition was edited by Jon L. Dunn and Jonathan Alderfer, with map editing done by Paul Lehman. It contains 592 pages and every species recorded in North America up until 2016. [8] This most recently updated version contains 37 new species accounts, 80 new maps, 350 map revisions, and approximately 300 new illustrations. [8]
A species range map represents the region where individuals of a species can be found. This is a range map of Juniperus communis, the common juniper.. Species distribution, or species dispersion, [1] is the manner in which a biological taxon is spatially arranged. [2]
Birds of the World is a subscription-access database that aims to describe comprehensive life history information on birds. This includes: [1] Species accounts Details on taxonomy, habitat, breeding, diet, and behaviors; Family accounts; Hybrid and subspecies descriptions and photos; Migration and range maps; IUCN Conservation Status ...
It is one of the most sexually dimorphic in size of living bird species, only exceeded by the larger types of bustards and a select few members of the pheasant family. Cocks (males) typically range from 74 to 85 centimetres (29 to 33 inches) in length with wingspan of 90 to 125 cm (35 to 49 in) and an average weight of 4.1 kg (9 lb 1 oz).
eBird is an online database of bird observations providing scientists, researchers and amateur naturalists with real-time data about bird distribution and abundance.Originally restricted to sightings from the Western Hemisphere, the project expanded to include New Zealand in 2008, [1] and again expanded to cover the whole world in June 2010.
Some bird species undertake shorter migrations, travelling only as far as is required to avoid bad weather or obtain food. Irruptive species such as the boreal finches are one such group and can commonly be found at a location in one year and absent the next. This type of migration is normally associated with food availability. [178]
Scientists at the institute develop standardized bird-monitoring techniques and tools for land managers and researchers studying bird populations, coordinate large-scale networks for monitoring vital rates of birds, conduct original research on the abundance, distribution, and ecology of birds, and convey their findings in scientific papers and reports to public and private land managers.