Blue-headed Vireos have a low nesting success rate, with about 10-30 percent of hatchlings surviving.

Blue-headed Vireo's have an atypical breeding strategy when compared to other closely related species.

There are currently two recognized sub-species that belong to the Blue-headed Vireo.

The average lifespan of the Blue-headed Vireo in the wild has been measured to be approximately 7 years and 5 months.

The taxonomy reverted to that prior to the 1950s, and the Blue-headed Vireo was once again its own species.

At the end of the breeding season, the Blue-headed Vireo migrates south to its overwintering area.

Blue-headed Vireos have also been known to nest close to nesting raptorial birds that do not prey on them.

Blue-headed Vireo, is found in the ledges and Hemlocks.

The Blue-headed Vireo has similar plumage year round and does not drastically change its appearance during the breeding season.

During the winter, Blue-headed Vireos inhabit mixed woods of pines and hardwoods.

As the name suggests, the Blue-headed Vireo is characterized by its blue-grey head and bold yellow wing bars.

There are two recognized subspecies of Blue-headed Vireo:

The juvenile plumage of immature Blue-headed Vireos is not distinct but very similar to the adult plumage.

During migration, Blue-headed vireos are often found to flock with groups of different sparrow species but rarely with members of its own species.

Populations of the Blue-headed Vireo have been steadily increasing since the 1970s and has therefore been classified as a "Least Concern" species in 2004.

Likewise, males make no attempt to guard females from other males, making Blue-headed Vireos both socially and genetically monogamous birds.

Common predators of the Blue-headed Vireo eggs and chicks include Blue Jays, crows, and squirrels.

This species was formerly considered to belong to the same species as the Plumbeous Vireo and Blue-headed Vireo.

Blue-headed Vireo males will assist their mates with daytime incubation of eggs, nest construction, and feeding of the chicks (Morton et al. 1998).

Blue-headed Vireo photo gallery VIREO-(with pictures of bulky cup nest)

Native to North America, the Blue-headed Vireo enjoys a large breeding range that extends over an immense area of Canada and northern United States.

This large and varied diet is an example of an opportunistic feeding strategy, allowing the Blue-headed Vireo to be plastic in its ability to adapt to resource availability.

The Blue-headed Vireo (Vireo solitarius) is a Neotropical migrating song bird found in North and Central America.

The largest contributor to the low nesting success rate of the Blue-headed Vireo is most likely the parasitic Brown-headed Cowbird (Molothrus ater).

It was found that in the early breeding season, male Blue-headed Vireos have a low testosterone level and will maintain this low level at all stages of the season.

Vireo solitarius alticola is slightly larger than the nominate species.

These were formerly believed to make up a single species Vireo solitarius, but are now treated as three allopatric species:

This group of vireos was collectively known as the "Solitary Vireo" (Vireo solitarius).

The Blue-headed Vireo (Vireo solitarius) is a Neotropical migrating song bird found in North and Central America.