This type of hummingbird is known to frequent several habitats, particularly along the borders of mountainous forests. It can also be found in man-made areas like plantations, gardens, and parks. It is a prevalent species that can be spotted up to 1,000 meters in altitude and is also seen commonly along the coastline.

The Red-billed Streamertail, a bird known for being a mainstay in its habitat, feeds on nectar extracted from a variety of vibrant and scented small flowers found on various plant species. In search of nectar with a high sugar content, they use their long and extendable tongue that resembles a straw to reach the nectar while hovering with their tails pointing upwards. They have the ability to lick the nectar up to 13 times per second. Although they primarily consume nectar, they also eat insects when given the opportunity.

During breeding season, it is the female’s responsibility to construct a small cup-shaped nest made from plant fibers on a low and skinny branch situated between 1 to 3 meters above the ground. The nest is lined with soft material and strengthened using spider webs. She then lays up to two white eggs, which she incubates for approximately 17 to 19 days. Once the eggs hatch, she proceeds to feed the chicks until they are around 19-24 days old before leaving the nest, taken care of by the female for another three to four weeks. The male’s only role in the breeding process is mating.

Despite having a limited distribution, the Red-billed Streamertail bird species can be found throughout much of Jamaica and is considered to be of Least Concern on the IUCN list.