According to the website eHow.com, the Hook-billed Hermit Hummingbird is the only hummingbird species to be listed under the Endangered Species Act or ESA. This species of hummingbird lives in the forest of eastern Brazil. The habitat of the Hook-billed Hermit Hummingbird is being damaged and destroyed due fire and road building.
Also, global warming or a rise in the temperature of the Earth’s atmosphere is effecting the migration of hummingbirds in general. This may cause the hummingbirds to be in unusual locations and thus find that the food supply is quite scarce.