The Sword–billed Hummingbird is a species of hummingbird in the Trochilidae family and the order Apodiformes.
It is a neotropical species of hummingbird from the Andean regions of South America. It is the sole member of the genus Ensifera and is characterized by its unusually long bill; it is the only bird to have a bill longer than the rest of its body. E. ensifera uses its bill to drink nectar from flowers with long corollas and has coevolved with the species Passiflora mixta.
The approximate size of these bird is 14 cm, the male has the head of a copper bronze tone, including the feathers at the base of the bill. It is bronze green on top, blackish throat, sides of the throat and iridescent green chest. The rest of the lower parts are bright green. Its tail is forked in bronze green. The female is above like the male, below is white. Its throat is dotted with olive; the rest of the lower parts are strongly spotted with a green tone. Its tail is marginally greyish white.
1700-3300m. (mainly 2400-3100m). It is located in the 3 mountain ranges (In the Western Cordillera north to the Cerro de Tamaná, located north of the Valley; in the Central Cordillera north to Quindío). In the Andes from Venezuela to northern Bolivia.
It is usually a solitary hummingbird in medium-high stratum. It perches with its bill pointing upwards. flutter when drinking, keeping the bill vertically upwards. Prefers spp. of Passiflora and Datura, which he visits following his regular routes. Occasionally he is seen catching insects in the air.