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A field guide is a
book A book is a medium for recording information in the form of writing or images, typically composed of many pages (made of papyrus, parchment, vellum, or paper) bound together and protected by a cover. The technical term for this physical a ...
designed to help the reader identify
wildlife Wildlife refers to undomesticated animal species, but has come to include all organisms that grow or live wild in an area without being introduced by humans. Wildlife was also synonymous to game: those birds and mammals that were hunted fo ...
(
flora Flora is all the plant life present in a particular region or time, generally the naturally occurring ( indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or ''skin flora''. ...
or fauna) or other objects of natural occurrence (e.g.
rock Rock most often refers to: * Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids * Rock music, a genre of popular music Rock or Rocks may also refer to: Places United Kingdom * Rock, Caerphilly, a location in Wales ...
s and minerals). It is generally designed to be brought into the "
field Field may refer to: Expanses of open ground * Field (agriculture), an area of land used for agricultural purposes * Airfield, an aerodrome that lacks the infrastructure of an airport * Battlefield * Lawn, an area of mowed grass * Meadow, a grass ...
" or local area where such objects exist to help distinguish between similar objects. Field guides are often designed to help users distinguish animals and plants that may be similar in appearance but are not necessarily closely related. It will typically include a description of the objects covered, together with paintings or photographs and an index. More serious and scientific field identification books, including those intended for students, will probably include
identification key In biology, an identification key, taxonomic key, or biological key is a printed or computer-aided device that aids the identification of biological entities, such as plants, animals, fossils, microorganisms, and pollen grains. Identification ke ...
s to assist with identification, but the publicly accessible field guide is more often a browsable picture guide organized by family, colour, shape, location or other descriptors.


History

Popular interests in identifying things in nature probably were strongest in bird and plant guides. Perhaps the first popular field guide to plants in the United States was the 1893 ''How to Know the Wildflowers'' by "Mrs. William Starr Dana" ( Frances Theodora Parsons). In 1890, Florence Merriam published ''Birds Through an Opera-Glass'', describing 70 common species. Focused on living birds observed in the field, the book is considered the first in the tradition of modern, illustrated bird guides. In 1902, now writing as Florence Merriam Bailey (having married the zoologist Vernon Bailey), she published ''Handbook of Birds of the Western United States''. By contrast, the ''Handbook'' is designed as a comprehensive reference for the lab rather a portable book for the field. It was arranged by
taxonomic order Taxonomic sequence (also known as systematic, phyletic or taxonomic order) is a sequence followed in listing of taxa which aids ease of use and roughly reflects the evolutionary relationships among the taxa. Taxonomic sequences can exist for taxa ...
and had clear descriptions of
species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...
size, distribution, feeding, and nesting habits. From this point into the 1930s, features of field guides were introduced by Chester A. Reed and others such as changing the size of the book to fit the pocket, including colour plates, and producing guides in uniform editions that covered subjects such as garden and woodland flowers, mushrooms, insects, and dogs. In 1934,
Roger Tory Peterson Roger Tory Peterson (August 28, 1908 – July 28, 1996) was an American naturalist, ornithologist, illustrator and educator, and one of the founding inspirations for the 20th-century environmental movement. Background Peterson was born in James ...
, using his fine skill as an artist, changed the way modern field guides approached identification. Using color plates with paintings of similar species together – and marked with arrows showing the differences – people could use his bird guide in the field to compare species quickly to make identification easier. This technique, the "
Peterson Identification System 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 in 1934 for the first of his series of ''Field Guide''s (See P ...
", was used in most of Peterson's Field Guides from
animal tracks __notoc__ An animal track is an imprint left behind in soil, snow, or mud, or on some other ground surface, by an animal walking across it. Animal tracks are used by hunters in tracking their prey and by naturalists to identify animals living i ...
to seashells and has been widely adopted by other publishers and authors as well. Today, each field guide has its own range, focus and organization. Specialist publishers such as Croom Helm, along with organisations like the
Audubon Society The National Audubon Society (Audubon; ) is an American non-profit environmental organization dedicated to conservation of birds and their habitats. Located in the United States and incorporated in 1905, Audubon is one of the oldest of such organ ...
, the
RSPB The Royal Society for the Protection of Birds (RSPB) is a charitable organisation registered in England and Wales and in Scotland. It was founded in 1889. It works to promote conservation and protection of birds and the wider environment t ...
, the
Field Studies Council Field Studies Council is an educational charity based in the UK, which offers opportunities for people to learn about and engage with the outdoors. History It was established as the Council for the Promotion of Field Studies in 1943 with the ...
, National Geographic, HarperCollins, and many others all produce quality field guides.


Principles

It is somewhat difficult to generalise about how field guides are intended to be used, because this varies from one guide to another, partly depending on how expert the targeted reader is expected to be. For general public use, the main function of a field guide is to help the reader identify a bird, plant, rock, butterfly or other natural object down to at least the popular naming level. To this end some field guides employ simple keys and other techniques: the reader is usually encouraged to scan illustrations looking for a match, and to compare similar-looking choices using information on their differences. Guides are often designed to first lead readers to the appropriate section of the book, where the choices are not so overwhelming in number. Guides for students often introduce the concept of
identification key In biology, an identification key, taxonomic key, or biological key is a printed or computer-aided device that aids the identification of biological entities, such as plants, animals, fossils, microorganisms, and pollen grains. Identification ke ...
s. Plant field guides such as ''Newcomb's Wildflower Guide'' (which is limited in scope to the wildflowers of northeastern North America) frequently have an abbreviated key that helps limit the search. Insect guides tend to limit identification to Order or Family levels rather than individual species, due to their diversity. Many taxa show variability and it is often difficult to capture the constant features using a small number of photographs. Illustrations by artists or post processing of photographs help in emphasising specific features needed to for reliable identification. Peterson introduced the idea of lines to point to these key features. This passage was written by his wife, Virginia Marie Peterson, in the preface to one of his field guides: Field guides aid in improving the state of knowledge of various taxa. By making the knowledge of experienced museum specialists available to amateurs, they increase the gathering of information by amateurs from a wider geographic area and increasing the communication of these findings to the specialists.


Notes


References


External links


Field Guides
from the
Encyclopedia of Life The ''Encyclopedia of Life'' (''EOL'') is a free, online encyclopedia intended to document all of the 1.9 million living species known to science. It is compiled from existing trusted databases curated by experts and with the assistance of non ...
. {{Authority control Biological literature Natural history Wild animals identification Reference works