The female has entirely white underparts from throat to vent and distinctive green spots along the sides of the breast.

They are part of the family Trochilidae, also known as the hummingbirds, which are distinguished by their small size, high metabolism and extremely rapid wing-flapping.

[10][11] The sapphire-throated hummingbird has a full shiny metallic-green plumage, except for its darker tail and wings.

Small in size, the hummingbird measures about 8.5–9.5 cm (3.3–3.7 in) centimeters in length and 4–4.5 grams (0.14–0.16 oz) in weight.

[7][12] The subspecies Chrysuronia coeruleogularis confinis is more specifically found on the Caribbean slope in eastern Panama and north-west Columbia.

[7][12] Whereas the subspecies Chrysuronia coeruleogularis coelina is more specifically found in the northern parts of Colombia, from north Chocó through Ciénaga Grande de Santa Marta.

[4][7][12] In 2008, a male species of sapphire-throated hummingbird was discovered in Costa Rica as far as 35 kilometers north of the Panamanian border.

[3] However, some unconfirmed records from 1962 in Costa Rica are thought to have been a mislabeled specimen, which was later found to be a sapphire-throated hummingbird.

The hummingbirds have been found using modified habitats, such as protected areas like the Tayrona National Natural Park in Colombia.

[12] During flight, hummingbirds have one of the highest metabolism and therefore require to eat more than their own weight in nectar each day to avoid starvation.

Placed on a low and thin forked branch, she makes the nest in the shape of a cup with plant fibers woven together and covered in moss as a form of camouflage.

[7] Since the males do not aid with raising the young, the females are left to protect and feed the younglings via regurgitated food.

[12] Although the main food resource for the sapphire-throated hummingbird is nectar, it does not supply enough protein for the bird, especially during breeding season and the juvenile's fledging period.

Like most birds, the sapphire-throated hummingbirds has many calls, but their most common song is a high-pitched rattle sounding like "wi-didididididididididi".