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;Anser fabalis | ;Anser fabalis | ||
| − | [[Image:Bean_Goose.jpg|thumb|550px|right|Photo by ilovebird. Location: | + | [[Image:Bean_Goose.jpg|thumb|550px|right|Photo by ilovebird.<br/ >Location: South Korea.]] |
==Identification== | ==Identification== | ||
The Taiga form of this species is a dark goose with a long neck, in which the head, neck, and back are dark brownish, lightest on the back. Underside is lighter. In flight, the tail will be noticable with narrow terminal white band, broader black band, and the innermost part again white. Belly will be white, while both upper and underside of wings are dark, without much contrast between coverts and primaries/secondaries. Noticable is the bill which is quite long and very variable with regards to extent of black and orange; orange often found on the distal part and almost always more extensive than in the Tundra form. There may be a narrow white edge between bill and feathers on the head, especially above the bill. | The Taiga form of this species is a dark goose with a long neck, in which the head, neck, and back are dark brownish, lightest on the back. Underside is lighter. In flight, the tail will be noticable with narrow terminal white band, broader black band, and the innermost part again white. Belly will be white, while both upper and underside of wings are dark, without much contrast between coverts and primaries/secondaries. Noticable is the bill which is quite long and very variable with regards to extent of black and orange; orange often found on the distal part and almost always more extensive than in the Tundra form. There may be a narrow white edge between bill and feathers on the head, especially above the bill. | ||
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Juvenile forms are more scaly on the back and lack the white at the base of the bill. | Juvenile forms are more scaly on the back and lack the white at the base of the bill. | ||
==Taxonomy and Distribution== | ==Taxonomy and Distribution== | ||
| − | Subspecies ''fabilis'' is often called Taiga Bean Goose (''Anser fabilis'') together with subspecies ''johanseni'' and ''middendorfii'', and occurs from | + | Subspecies ''fabilis'' is often called Taiga Bean Goose (''Anser fabilis'') together with subspecies ''johanseni'' and ''middendorfii'', and occurs from Scandinavia to the Ural Mountains to Lake Baikal, and into eastern Siberia (''johanseni'' and ''middendorfii'' does not seem to be recognized by all authorities). Subspecies ''rossicus'' together with ''serrirostris'' is often called Tundra Bean Goose (''Anser rossicus'') and occurs from Northern [[Russia]] to north-east Siberia. Both forms occur in [[Europe]] in winter, with northernmost flocks almost exclusively belonging to the Taiga form. |
The two forms (Taiga vs Tundra) are recognized as full species by several authorities, but not currently by Sibley and Monroe which the Opus database is based upon. | The two forms (Taiga vs Tundra) are recognized as full species by several authorities, but not currently by Sibley and Monroe which the Opus database is based upon. | ||
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{{GSearch|Anser+fabalis}} | {{GSearch|Anser+fabalis}} | ||
*[http://www.orientalbirdimages.org/birdimages.php?action=birdspecies&Bird_ID=164&Bird_Image_ID=3223&Bird_Family_ID=59 View more images of this species on Orientalbirdimages] | *[http://www.orientalbirdimages.org/birdimages.php?action=birdspecies&Bird_ID=164&Bird_Image_ID=3223&Bird_Family_ID=59 View more images of this species on Orientalbirdimages] | ||
| − | [[Category:Birds]] | + | [[Category:Birds]] [[Category:Incomplete]] |
Revision as of 00:18, 1 October 2007
- Anser fabalis
Identification
The Taiga form of this species is a dark goose with a long neck, in which the head, neck, and back are dark brownish, lightest on the back. Underside is lighter. In flight, the tail will be noticable with narrow terminal white band, broader black band, and the innermost part again white. Belly will be white, while both upper and underside of wings are dark, without much contrast between coverts and primaries/secondaries. Noticable is the bill which is quite long and very variable with regards to extent of black and orange; orange often found on the distal part and almost always more extensive than in the Tundra form. There may be a narrow white edge between bill and feathers on the head, especially above the bill.
The Tundra form is very similar, but the neck is shorter and heavier, and the bill is shorter than in the Taiga form (not much longer than it is high). In addition, birds with more than a small orange spot near the tip of the bill are rare in this form; the orange is always sharply defined where it will mostly be more diffusely edged in the Taiga form.
Juvenile forms are more scaly on the back and lack the white at the base of the bill.
Taxonomy and Distribution
Subspecies fabilis is often called Taiga Bean Goose (Anser fabilis) together with subspecies johanseni and middendorfii, and occurs from Scandinavia to the Ural Mountains to Lake Baikal, and into eastern Siberia (johanseni and middendorfii does not seem to be recognized by all authorities). Subspecies rossicus together with serrirostris is often called Tundra Bean Goose (Anser rossicus) and occurs from Northern Russia to north-east Siberia. Both forms occur in Europe in winter, with northernmost flocks almost exclusively belonging to the Taiga form.
The two forms (Taiga vs Tundra) are recognized as full species by several authorities, but not currently by Sibley and Monroe which the Opus database is based upon.
Habitat
Breeds in Tundra and humid openings in northern forest, especially birch and coniferous forests. Winters in agricultural areas, mostly grassy fields.
Behavior
Bird Song
<flashmp3>Anser fabalis (song).mp3</flashmp3>
Listen in an external program
