Quantcast

Latest Spizella Stories

Team Of Rivals Approach Used By Sparrows For Defending Territories
2014-02-26 11:08:05

University of Massachusetts at Amherst A new study of territorial songs used by chipping sparrows to defend their turf reveals that males sometimes will form a "dear enemy" alliance with a weaker neighbor to prevent a stronger rival from moving in. University of Massachusetts Amherst graduate student Sarah Goodwin and her advisor, behavioral ecologist Professor Jeffrey Podos, report their findings in the current issue of Biology Letters. They say that Goodwin's playback studies, funded...

Young And Old Song Sparrows Experience Climate Change Differently
2013-08-12 15:52:50

University of California - Davis What's good for adults is not always best for the young, and vice versa. At least that is the case with song sparrows and how they experience the effects of climate change, according to two recent studies by scientists at the University of California, Davis, and Point Blue Conservation Science. Both studies show the importance of considering the various stages and ages of individuals in a species -- from babies to juveniles to adults -- to best predict...

Younger Birds Get No Respect
2012-02-09 04:01:34

When mature male white-crowned sparrows duel to win a mate or a nesting territory, a young bird just doesn't get much respect. Researchers found that older male white-crowned sparrows don't put much of a fight when they hear a young male singing in their territory — probably because the older bird doesn't consider the young rival much of a threat. But a male sparrow will act much more aggressively if it hears a bird of the same age singing in a territory it claims as its own....

11730f6f68b7a5e368cc9056619442be
2011-08-11 08:31:17

While singing the same songs as your neighbors may sound harmonious, research conducted at Queen's University Biological Station (QUBS) suggests that song-sharing amongst song sparrow populations is actually an aggressive behavior, akin to flinging insults back and forth. "It's been hypothesized that repertoire size and song complexity is about the singer's ability to advertise their quality as a mate," says lead author Janet Lapierre, a visiting biologist from the University of Western...

e1d0f81cd51febba081a5ba59d9439441
2009-10-21 08:19:31

It may take a village to raise a child, and apparently it takes at least two adult birds to teach a young song sparrow how and what to sing. In the first study conducted in the field to examine how juvenile song birds learn their repertoire, University of Washington researchers have learned that eavesdropping on the singing conversations between two adult sparrows appears to be a key event in song learning. The results are being published Oct. 21 in the online edition of the Proceedings of...

2009-05-21 15:34:07

A U.S. biologist says she has discovered bird songs can change as a bird's habitat changes. Elizabeth Derryberry said she made her discovery while conducting her dissertation research at Duke University. She said as vegetation reclaimed formerly cleared land in California, Oregon and Washington during the last 35 years, male white-crowned sparrows have lowered their pitch and slowed their singing so that their love songs would carry better through heavier foliage. This is the first time that...


Latest Spizella Reference Libraries

38_3dde4b13002fa21f5296868c4e6afb50
2006-11-19 21:35:08

The Brewer's Sparrow, Spizella breweri, is a small, slim sparrow. There are two distinct populations of this bird. Spizella breweri breweri is found in brushy areas in southern parts of western Canada and in the western United States. Spizella breweri taverneri is found in thicketed areas in the Rockies of northern British Columbia, the southern Yukon and southeastern Alaska. Adults have gray-brown backs and brown crowns, both with dark streaks, and a pale eye-ring. Their wings are brown...

38_15f5851a2333887e3806918248dfe399
2006-02-21 14:44:52

The Field Sparrow (Spizella pusilla) is a small sparrow with brown upperparts, a light brown breast, a white belly, wing bars and a forked tail. They have a grey face, a rusty crown, a white eye ring and a pink bill. They prefer shrubby fields and can be found across eastern North America. The nest is an open cup on the ground under a clump of grass or in a small thicket. These birds are permanent residents in the southern parts of their range. Northern birds migrate to the southern...

38_d34f113975782f71d6cd10cdc09696cc
2006-02-21 14:32:10

The Clay-colored Sparrow (Spizella pallida) is a small sparrow found in shrubby open areas and Jack Pine woods across central Canada and central northern United States east to the Great Lakes. They build their nests on the ground or low in a shrub. Adults have light brown upperparts, pale underparts, and darker streaks on the back. The crown is dark brown with a pale stripe and the eyes sport a white line over each and a darker line within. The cheek patch is light brown. The wings are...

38_17c6638ef7cbd8847da3eacceeeba795
2006-02-21 05:52:07

The Swamp Sparrow (Melospiza Georgiana) is a medium-sized sparrow with a slow monotone trill, slower than that of the Chipping Sparrow. Adults have streaked rusty and black upperparts with a grey breast, light belly and a white throat. They have a rust-colored cap and wings. Their face is grey with a dark line through the eye. They have a short bill and fairly long legs. Their breeding habitat consists of marshes (including salt marshes) across eastern North America and central Canada....

34_3d3462faa1905d1b86ae331caa2ac980
2005-06-14 12:14:29

The American Tree Sparrow (Spizella arborea) is a medium-sized sparrow that has a rusty cap and grey under-parts with a small dark spot on the breast. They have a rusty back with lighter stripes, brown wings with white bars and a slim tail. Their face is grey with a rusty line through the eye. Their flanks are splashed with light brown. They are similar in appearance to the Chipping Sparrow. Their breeding habitat is tundra or the northern limits of the boreal forest in Alaska and northern...

More Articles (7 articles) »
Word of the Day
barratry
  • The offense of persistently instigating lawsuits, typically groundless ones.
  • An unlawful breach of duty on the part of a ship's master or crew resulting in injury to the ship's owner.
  • Sale or purchase of positions in church or state.
This word ultimately comes from the Old French word 'barater,' to cheat.
Related