The Sword-billed Hummingbird has a bill 8.1–12 cm long, nearly as long as its body. A study examined its Andean range and overlap with long-flowered plants.
Measurements summarized in the paper put the bill at 81–120 mm, nearly the bird's body length. Reported mean bill lengths were 103 mm for females and 96 mm for males.
Researchers compiled published visitation records for 24 long-flowered plant species and modeled their overlap with the hummingbird's range; the predicted overlap varied by region.
An extinction-risk assessment has not been added yet.