Peterson Identification System
Encyclopedia
The Peterson Identification System is a practical method for the field identification of animals, plants and other natural phenomena. It was devised by ornithologist Roger Tory Peterson
Roger Tory Peterson
Roger Tory Peterson , was an American naturalist, ornithologist, artist, and educator, and held to be one of the founding inspirations for the 20th century environmental movement.-Background:...

 in 1934 for the first of his series of Field Guides (See Peterson Field Guides
Peterson Field Guides
The Peterson Field Guides are a popular and influential series of American field guides intended to assist the layman in identification of birds, plants, insects and other natural phenomena. The series was created and edited by renowned ornithologist Roger Tory Peterson...

.) Peterson devised his system "so that live birds could be identified readily at a distance by their 'field marks' without resorting to the bird-in-hand characters that the early collectors relied on. During the last half century the binocular and the spotting scope have replaced the shotgun." As such, it both reflected and contributed to awareness of the emerging early environmental movement
Environmental movement
The environmental movement, a term that includes the conservation and green politics, is a diverse scientific, social, and political movement for addressing environmental issues....

.

The system

Created for use by amateur
Amateur
An amateur is generally considered a person attached to a particular pursuit, study, or science, without pay and often without formal training....

 naturalists and laymen, rather than specialists, the "Peterson System" is essentially a pictorial key based upon readily noticed visual impressions rather than on the technical features of interest to scientists. The technique involves patternistic drawings with arrows that pinpoint the key field comparisons between similar species.

Influence

Since the first Peterson Field Guide, the system has been expanded to about three dozen volumes in the series as well as being emulated by many other publishers and authors of field guide
Field guide
A field guide is a book designed to help the reader identify wildlife or other objects of natural occurrence . It is generally designed to be brought into the 'field' or local area where such objects exist to help distinguish between similar objects...

s. It has become the near-universally accepted standard, first in the United States and Europe and then around the world.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK