White-necked Jacobin

Overview

The White-necked Jacobin is a fairly large, boldly patterned hummingbird found in lowland and foothill forest, forest edge, and clearings from southern Mexico through Central America and into much of northern and central South America. Its strong color-blocking makes males particularly easy to recognize compared to many more uniformly green hummingbird species.

Males show a deep blue-violet head and upper breast sharply divided from a broad white band across the nape, with white extending across the belly and much of the tail, giving an overall pied appearance unlike most other hummingbirds sharing its habitat.

Feather ID Notes

The male's head and throat feathers show deep blue-violet iridescence, sharply bordered by a wide white band of feathers across the nape - a clean, high-contrast boundary rather than a gradual blend. The belly is white, and the tail shows white outer feathers with a dark central band, visible as a white tail with a dark tip in flight.

• Head/throat feathers: blue-violet, iridescent
• Nape feathers: broad white band, sharply demarcated from the head color
• Belly feathers: white
• Tail feathers: mostly white with a dark terminal band This strongly pied combination of blue-violet, white, and a dark tail band is distinctive and not closely matched by other hummingbirds in its range.

Plumage Details

Adult males show the bold pied pattern described above. Females and immatures are more variable, generally green above with a scaled or mottled throat and breast pattern and white underparts, lacking the male's solid blue-violet head; some females can show plumage intermediate between typical female and male patterns. There is no strong seasonal plumage change, with feather condition maintained by an annual molt.

Habitat & Range

This species occupies lowland and foothill humid forest, forest edge, and clearings from southern Mexico through Central America and across much of northern and central South America. Most populations are resident, though some local movements occur in response to flowering patterns.

Behavior & Field Notes

White-necked Jacobins feed on nectar from a wide range of forest flowers and flowering trees, often foraging in the canopy as well as at lower forest edges, and also take small insects. They can be aggressive around rich nectar sources, chasing off other hummingbirds. Nests are cup-shaped, built on slender branches, sometimes over water. Calls include sharp chips and buzzy chattering notes during interactions.