This streaky hummingbird has a remarkably decurved bill like a Velociraptor claw. The bill shape alone distinguishes it from all hummingbirds except the very similar Buff-tailed Sicklebill, which only overlaps in some areas of the range. Sicklebills are most often seen feeding on Heliconia flowers in the dark forest understory; they’re generally uncommon and fast-moving, difficult to get a look at. Does not visit feeders.