Black-throated Magpie-Jay

The Black-throated Magpie-Jay, Calocitta colliei, is a species of notable grandeur, primarily due to its remarkably elongated tail, which accounts for more than half of its total length of 58.5 to 76.5 cm. This bird, with a weight range of 225–251 g, is adorned with a striking plumage; the upperparts dazzle in blue, complemented by white-tipped tail feathers, while the underparts are a pristine white. A black bill, legs, head, and an eye-catching crest, along with a pale blue crescent above the eyes and a patch beneath, complete the ensemble. Juveniles can be distinguished by their white-tipped crests and smaller, darker blue eye patches.

Identification Tips

To identify the Black-throated Magpie-Jay, look for the long tail and the contrasting black and blue plumage. The black throat and chest are key features, although some southern individuals may exhibit white in these areas. The pale blue crescent over the eyes and the patch under the eye are also distinctive markers.

Habitat

This species is found in woodlands and partially open areas, avoiding humid forests. It thrives on the Pacific Slope of Mexico, where it can be observed in pairs or small groups.

Distribution

The Black-throated Magpie-Jay graces the Pacific Slope of Mexico, from southern Sonora down to Jalisco and northwestern Colima. It has also established a presence in southern San Diego County, likely descendants of escapees from the pet trade in Tijuana.

Behaviour

An omnivorous diet is typical for this corvid, and its nesting habits are consistent with its family, constructing large stick nests lined with softer materials. The female lays 3 to 7 whitish eggs speckled with brown and gray. Notably, this species interbreeds with the White-throated Magpie-Jay in certain areas, resulting in intermediate offspring.

Song & Calls

The vocalizations of the Black-throated Magpie-Jay are diverse, loud, and raucous, with some calls resembling those of parrots.

Breeding

The Black-throated Magpie-Jay's breeding involves the construction of a substantial cup-shaped nest of sticks, where the female deposits her clutch of speckled eggs.

Similar Species

The White-throated Magpie-Jay is a close relative and can be confused with the Black-throated Magpie-Jay. However, the latter can be distinguished by its black throat and chest, as opposed to the white of the former.

Diet and Feeding

As an omnivore, the Black-throated Magpie-Jay's diet is varied, including both plant material and small animals.

Conservation status

The IUCN Red List currently classifies the Black-throated Magpie-Jay as Least Concern, indicating that, at present, there are no immediate threats to its population numbers. However, there has been some evidence of a population decline.