Northern birds remain further north in winter than the ruby-crowned kinglet.

The recent counting indicates that the ruby-crowned kinglet population is on the rise.

Hybridization with ruby-crowned kinglet has been reported to have possibly occurred.

Larry heard a Ruby-crowned Kinglet a.m., first reported this year.

The ruby-crowned kinglet's vocalizations are remarkably loud and complex for its size.

It closely resembles a ruby-crowned kinglet, but has a thicker bill and is slightly larger in size.

Ruby-crowned Kinglet To view annual indices of population change please click on a geographic area.

The exception is the ruby-crowned kinglet, the largest species, which has a strongly red crest and no black crown stripes.

The ruby-crowned kinglet, an American Regulus species and a potential vagrant in Europe, could be more difficult to distinguish.

The ruby-crowned kinglet is not closely related to other kinglets, and is put in its own subgenus, Corthylio.

The ruby-crowned kinglet builds a cup-shaped nest, which may be pensile or placed on a tree branch and is often hidden.

Western Ruby-crowned Kinglet.

Some birds, like the ruby-crowned kinglet and red-eyed vireo of North America use a combination of these tactics.

Other vocalizations of the ruby-crowned kinglet include alarm calls, simple contact calls, and begging calls produced by chicks.

Five species have a single stiff feather covering the nostrils, but in the ruby-crowned kinglet, this is replaced by several short, stiff bristles.

The ruby-crowned kinglet (Regulus calendula) is a very small passerine bird found throughout North America.

An avid naturalist and environmentalist, Murray began birding at the age of 6 when he identified his first Ruby-crowned Kinglet.

The Guadalupe ruby-crowned kinglet (Regulus calendula obscurus) is close to extinction, if it indeed still exists.

One species, the ruby-crowned kinglet, differs sufficiently in its voice and plumage to occasionally be afforded its own genus, Corthylio.

Compared to the related golden-crowned kinglet, the ruby-crowned kinglet is slightly larger, more elongated, and has greener plumage.

Regulus calendula (Ruby-crowned kinglet)

Also starring in the film: the prothonotary warbler, ruby-crowned kinglet, olive-sided flycatcher, Eastern screech owl and dozens of other birds.

On the coast, the Ruby-crowned Kinglet is present throughout the year; in the interior, it is regularly present from 21 March through 22 November.

Randy heard both the Ruby-crowned Kinglet and the Golden-crowned Kinglet in the Meadows.

Horwood (1992) shows the Ruby-crowned Kinglet as a breeding species in the Kitimat River valley, but this, too, is probably inferred from summer presence.

The ruby-crowned kinglet (Regulus calendula) is a very small passerine bird found throughout North America.

• Ruby-crowned Kinglet (Regulus calendula)

Two species closely tied to coniferous habitats, the tree-nesting Ruby-crowned Kinglet (Regulus calendula) and the red squirrel (Tamiasciurus hudsonicus), a major nest predator, were less abundant in forest stands with high spruce mortality than in low-mortality stands.