Nearctic

Definition and stakes

Portrait of Alfred Russel Wallace Alfred Russel Wallace,  Island Life — Chapter III. (1895)

“ Definition and Characteristic Groups of the Nearctic Region.—The Nearctic region comprises all temperate and arctic North America, including Greenland, the only doubt being as to its southern boundary, many northern types penetrating into the tropical zone by means of the highlands and volcanic peaks of Mexico and Guatemala, while a few which are characteristic of the tropics extend northward into Texas and California. ”
Source: Wikisource

Portrait of Alfred Russel Wallace Alfred Russel Wallace,  The Geographical Distribution of Animals…

“ The above are all groups which are either wholly Nearctic or typically so, but entering more or less into the debatable ground of the Neotropical region; though none possess any peculiar species in the ancient Neotropical land south of Nicaragua. But we have, besides these, a number of genera which we are {119}accustomed to consider as typically European, or Palæarctic, having representatives in North America; although in many cases it would be more correct to say that they are Nearctic genera, represented in Europe, since America possesses more species than Europe or North Asia. ”
Source: Gutenberg

Portrait of Alfred Russel Wallace Alfred Russel Wallace,  The Geographical Distribution of Animals… (1876)

“ This is undoubtedly the case if any fixed geographical boundary is taken; and it would thus seem that the "Nearctic" should, in birds, form a sub-region only. But, if we define "Nearctic genera" as above indicated, we find a considerable amount of speciality, as the following list will show. The names not italicised are those which are represented in Mexico or Guatemala by peculiar species:—
List of Typical Nearctic Genera of Land Birds.
”
Source: Wikisource

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