bluebird

 

common name for a North American migratory bird of the family Turdidae (thrush family). The eastern bluebird, Sialia sialis, is among the first spring arrivals in the North. It is about 7 in. (17.8 cm) long. The plumage of the male appears vivid blue in bright light and black at a distance; the breast is cinnamon-red, the under parts white. The female's coloring is duller. The bluebird usually nests in orchards or on the edges of woodlands but will also use nesting boxes. As a destroyer of insects it is of great value; it also eats wild fruits. Related birds are the mountain, the western (genus Sialia) or chestnut-backed, and the Florida bluebirds. Bluebirds have a cheerful call and a sweet, warbling song. They raise several broods during a single mating season. The female is responsible for the incubation duties. Bluebirds are classified in the phylum Chordata, subphylum Vertebrata, class Aves, order Passeriformes, family Turdidae.

Bluebirds
Eastern Bluebird
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Aves Order: Passeriformes Family: Turdidae Genus: Sialia
Species
Sialia sialis Sialia mexicana Sialia currucoides

The bluebirds are medium-sized, mostly insectivorous or omnivorous birds in the genus Sialia of the thrush family Turdidae.

These are one of the relatively few thrush genera to be restricted to the Americas. As the name implies, these are attractive birds with blue, or blue and red, plumage. Female birds are less brightly colored than males, although color patterns are similar and there is no noticeable difference in size between sexes.

Species:

• Eastern Bluebird, Sialia sialis
• Western Bluebird, Sialia mexicana
• Mountain Bluebird, Sialia currucoides

Behavior

Bluebirds are territorial, prefer open grassland with scattered trees and are cavity nesters (similar to many species of woodpecker). Bluebirds can typically produce between two to four broods during the spring and summer (March through August in the Northeastern United States). Males identify potential nest sites and try to attract prospective female mates to those nesting sites with special behaviors that include singing and flapping wings, and then placing some material in a nesting box or cavity. If the female accepts the male and the nesting site she alone builds the nest and incubates the eggs.

Predators of young in the nests can include snakes, cats and raccoons. Non-native bird species competing with bluebirds for nesting locations include the Common Starling and House Sparrow, both of which kill adult bluebirds sitting on their nests along with the young and eggs in order to claim the nesting site.^[1]

Bluebirds are attracted to platform bird feeders, filled with grubs of the darkling beetle, sold by many online bird product wholesalers as mealworms. Bluebirds will also eat raisins soaked in water. In addition, in winter bluebirds use backyard heated birdbaths.

By the 1970s bluebird numbers had declined by estimates ranging to 70% due to unsuccessful competition with house sparrows and starlings, both introduced species, for nesting cavities, coupled with a decline in habitat. However, in late 2005 Cornell University's Lab of Ornithology reported bluebird sightings at many locations in the southern U.S. as part of its yearly Backyard Bird Count, a strong indication of the bluebird's return to the region. This upsurge can largely be attributed to a movement of volunteers establishing and maintaining bluebird trails.

Footnotes

1. ^ "House Sparrows Kill Eastern Bluebirds" by Patricia Adair Gowaty in Journal of Field Ornithology, Volume 55, Number 3, Summer, 1984, pp. 378-380.

External links

• Bluebird Nut Webite Dedicated to Bluebird Education & Awareness.
• Bluebird Nut Cafe Free Bluebird Discussion & Informational Group, Newcomers Welcome!
• Cornell BLUEBIRD-L email list - Caution: this is a high traffic list. However, users are welcoming and eager to provide information on a range of subjects to bluebird enthusiasts with diverse levels of birding experience.
• Eastern Bluebird Cornell descriptions, including range, calls and physical description
• Western Bluebird Cornell descriptions, including range, calls and physical description
• Mountain Bluebird Cornell descriptions, including range, calls and physical description
• Bluebird videos on the Internet Bird Collection
• Bluebird Information and Awareness Dedicated to educating the public about the needs of the bluebird and providing the information needed to help them.
• National Geographic News article Covers N.A. Breeding Bird Survey, birdhouses, bluebird recovery
• North American Bluebird Society Dedicated to promoting the preservation of bluebirds.
• Sialis Information on bluebirds and their conservation and restoration.

Donate to Wikimedia