File:Song Sparrow Seedskadee NWR (16955809476).jpg
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[edit]DescriptionSong Sparrow Seedskadee NWR (16955809476).jpg |
On Seedskadee NWR, portions of wetlands containing emergent vegetation such as cattail and bulrush, host large numbers of songbirds, including red-winged blackbirds, marsh wrens, and as pictured song sparrows. During the spring, males will find a perch, often a cattail seedhead, to sing from. On a calm April morning, the marshes are filled with their bubbly song. Cool Facts About Song Sparrows The Song Sparrow is found throughout most of North America, but the birds of different areas can look surprisingly different. Song Sparrows of the Desert Southwest are pale, while those in the Pacific Northwest are dark and heavily streaked. Song Sparrows of Alaska’s Aleutian Islands chain are even darker, and they’re huge: one-third longer than the eastern birds, and weighing twice as much. Some scientists think that Song Sparrows of wet, coastal areas have darker plumage as a defense against feather mites and other decay agents that thrive in humid climates. The darker plumage contains more of a pigment called melanin, which makes feathers tougher and harder to degrade than lighter, unpigmented feathers. The range of the Song Sparrow is continuous from the Aleutians to the eastern United States. There’s also an isolated population that lives on the plateau of central Mexico, about 900 miles from the next closest population. These Song Sparrows have white throats and chests with black streaks. Song Sparrows seem to have a clear idea of what makes a good nest. Field researchers working for many years on the same parcels of land have noticed that some choice spots – the base of a rose bush, or a particular hollow under a hummock of grass, for example – get used over and over again, even when entirely new birds take over the territory. Despite the large differences in size and coloration across the Song Sparrow’s range, genetic divergence is low. High rates of immigration and emigration may keep populations genetically similar, while local selective conditions maintain the physical differences. Like many other songbirds, the male Song Sparrow uses its song to attract mates as well as defend its territory. Laboratory studies have shown that the female Song Sparrow is attracted not just to the song itself, but to how well it reflects the ability of the male to learn. Males that used more learned components in their songs and that better matched their song tutors (the adult bird they learned their songs from) were preferred. Song Sparrows often lay two or more clutches of eggs per breeding season. In exceptional circumstances, such as when resources are abundant or predation causes the loss of several clutches in a row, Song Sparrows have laid as many as seven clutches in a single breeding season, and have successfully reared up to four clutches. The Song Sparrow, like most other North American breeding birds, uses increasing day length as a cue for when to come into breeding condition. But, other cues can be important too, such as local temperature and food abundance. A study found that male Song Sparrows from the coast of Washington state came into breeding condition two months earlier than Song Sparrows in the nearby mountains, where the daylight changes were the same, but temperatures were cooler and trees budded out two months later. The oldest known Song Sparrow lived to be 11 years, 4 months old. <a href="http://www.allaboutbirds.org/guide/song_sparrow/lifehistory" rel="nofollow">www.allaboutbirds.org/guide/song_sparrow/lifehistory</a> Photo: Tom Koerner/USFWS |
Date | |
Source | Song Sparrow Seedskadee NWR |
Author | USFWS Mountain-Prairie |
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This image was originally posted to Flickr by USFWS Mountain Prairie at https://flickr.com/photos/51986662@N05/16955809476 (archive). It was reviewed on 17 May 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
17 May 2018
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This image or recording is the work of a U.S. Fish and Wildlife Service employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. For more information, see the Fish and Wildlife Service copyright policy.
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current | 09:51, 17 May 2018 | ![]() | 1,790 × 1,307 (1.33 MB) | OceanAtoll (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D300 |
Author | Picasa |
Exposure time | 1/1,600 sec (0.000625) |
F-number | f/8 |
ISO speed rating | 400 |
Date and time of data generation | 09:33, 30 March 2015 |
Lens focal length | 380 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.10 |
File change date and time | 12:56, 30 March 2015 |
Y and C positioning | Co-sited |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 09:33, 30 March 2015 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5.3 APEX (f/6.28) |
Metering mode | Spot |
Light source | Fine weather |
Flash | Flash did not fire |
DateTime subseconds | 56 |
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Scene type | A directly photographed image |
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Unique image ID | 041ed3be240d0ae2a60a720d41ee0dea |
IIM version | 4 |