
The Grey-Tailed Mountain-Gem or Gray-Tailed Mountain-Gem is a hummingbird species that breeds only in the mountains of southern Costa Rica.
The Gray-Chinned Hermit is a South American hummingbird species found in Colombia, Ecuador, Peru, Venezuela, and - marginally - far northern Brazil.
The Gray-Bellied Comet or Grey-Bellied Comet is a large hummingbird found only in a few small areas of Peru.
The Gorgeted Sunangel is a medium-sized hummingbird found on the west slope of Ecuador and extreme southwestern Colombia.
The Gorgeted Puffleg is a is a critically endangered hummingbird found in the Andes of southwestern Colombia.
The Golden Starfrontlet or Golden-Tailed Starfrontlet, often considered a subspecies of the Golden-Bellied Starfrontlet is fairly common but local in wet mossy montane forest and forest borders in the Venezuelan Andes.
The Glow-Throated Hummingbird is a small hummingbird native native to the Talamancan montane forests of western Panama and generally is found along edge habitats.
The Fire-Throated Metaltail or the Fiery-Throated Metaltail is a small hummingbird found only in Peru.
The Fiery-Tailed Awlbill is an uncommon bird native to Brazil, Ecuador, French Guiana, Guyana, Suriname, and Venezuela. Its bill is slightly curved upwards at the tip, a main distinction from other hummingbirds.
The Emerald-Bellied Puffleg is a small glittering green hummingbird found in Colombia, Ecuador, and Peru.
The Ecuadorian Piedtail is a fairly small South American hummingbird found locally in the foothills of southern Colombia, eastern Ecuador, and northern Peru. It is becoming rare due to habitat loss.