Peru Bird Species IX: White-bellied Woodstar

	Apodiformes
	Trochilidae
	Chaetocercus
	Colombia to Bolivia
	Least Concern

Taxonomy and General Information

The White-bellied Woodstar (Chaetocercus mulsant) is a species of hummingbird in the family Trochilidae and is considered one of the smallest hummingbirds in its range. It measures approximately 6.4 to 7.1 centimeters in length and weighs around 2.3 grams. Known for its rapid flight and hovering ability, it shares key behavioral traits with other hummingbirds.

Geographic Range and Habitat

This species is found in the Andes Mountains of:

• Colombia
• Ecuador
• Peru
• Northern Bolivia

It inhabits subtropical and tropical moist montane forests, especially:

• Forest edges
• Clearings
• Secondary growth areas

It usually lives at elevations between 1,000 and 3,000 meters, and sometimes visits gardens with flowering plants near human settlements.

Physical Characteristics

• Males:

  • Metallic green back
  • White underparts
  • Iridescent violet throat patch (gorget)
  • Slightly forked dark tail

• Females:

  • Buff-colored underparts
  • Green back
  • Rounded tail
  • No gorget

Both sexes have straight, slender black bills designed for nectar feeding. Their small size and plumage help distinguish them from other hummingbirds.

Behavior and Diet

The White-bellied Woodstar primarily feeds on:

• Nectar from tubular flowers
• Small insects and arthropods for protein

Unlike many hummingbirds, it tends to be less aggressive, often hovering quietly while feeding. Its flight is quick and agile, allowing it to move easily through dense vegetation and flowers.

Source: Wikipedia

Photo: Holmes Pantoja