Photo: Joseph C Boone / CC BY-SA 3.0 (Wikimedia Commons)
Long-tailed Sylph
Aglaiocercus kingii
Long-tailed Sylph (Aglaiocercus kingii) — Hummingbirds of South America.
Found across 6 guides in our atlas — open any for the full checklist, photos and what's around right now.
The Long-tailed Sylph (Aglaiocercus kingii) is a member of the Trochilidae family found in South America. Adults weigh 4.8 g. The IUCN Red List lists it as Least Concern.
Conservation status
IUCN Red List (opens in a new tab)Widespread and abundant — not currently at risk.
Where it fits
- Class Aves
- Order Apodiformes
- Family Trochilidae Hummingbirds
- Genus Aglaiocercus
- Species kingii
Quick facts
- Weight
- 4.8 g
- Diet
- Nectar-feeders
- Family
- Trochilidae
- Order
- Apodiformes
- Habitat
- Woodland
How to identify
Similar birds
Least Concern
Least Concern
Least Concern
Least Concern
Biology & behaviour
Diet
The Long-tailed Sylph is a nectarivore — it feeds mainly on nectar.
Behaviour
A bird of semi-open forest, it is highly aerial, spending much of its time on the wing.
Migration
The Long-tailed Sylph is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
The Long-tailed Sylph (Aglaiocercus kingii) is a member of the Trochilidae family, within the order Apodiformes. Its range spans South America. Its distribution covers SA Venezuela to wc Bolivia.
It is a very small bird. Adults weighs around 4.8 g, with a wing length of about 5.9 cm and a tail of around 4.6 cm.
The IUCN Red List currently assesses it as Least Concern. That category covers species that remain widespread and reasonably abundant in the wild.
Its mapped global range covers an estimated 268,000 km².
Songs & calls
Frequently asked questions
How big is the Long-tailed Sylph?
The Long-tailed Sylph is a very small bird that weighs around 4.8 g.
Where does the Long-tailed Sylph live?
The Long-tailed Sylph is found across South America with a range covering SA Venezuela to wc Bolivia, where it favours woodland, forest and well-treed country.
What family does the Long-tailed Sylph belong to?
The Long-tailed Sylph (Aglaiocercus kingii) belongs to the Trochilidae family, in the order Apodiformes.
What does the Long-tailed Sylph eat?
The Long-tailed Sylph is a nectarivore — it feeds mainly on nectar.
Does the Long-tailed Sylph migrate?
The Long-tailed Sylph is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
Is the Long-tailed Sylph endangered?
The IUCN Red List currently assesses it as Least Concern That category covers species that remain widespread and reasonably abundant in the wild.
What sound does the Long-tailed Sylph make?
1 real field recording of the Long-tailed Sylph — including its call — can be played in the Songs & calls section on this page, credited to the recordist who captured it.
How large is the Long-tailed Sylph's range?
The Long-tailed Sylph has a mapped global range of about 268,000 km².
Conservation
Every bird benefits from bird-safe windows, native plants, and keeping cats indoors. Small changes at home add up to real protection.
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Guides for this bird
Best Hummingbird Feeders
How to choose a hummingbird feeder — the two main styles compared, the right sugar-water mix, and how to keep it clean so the birds stay safe. A decision framework with the hummingbird species in the Birbs encyclopedia.
Meet the Trochilidae
A field guide to the Trochilidae family — 366 species in the Birbs encyclopedia, with the best-known members to start with.