This video from the USA says about itself:
Jewels Of The Davis Mountains: 2017 West Texas Hummingbird Cam Highlights
14 December 2017
From North America’s smallest breeding bird—the Calliope Hummingbird—to the comparably colossal Blue-throated Hummingbird, relive the rich diversity of tiny fliers (and more) that visited the West Texas hummingbird cam in 2017.
The West Texas Hummingbird Feeder Cam is nestled in the mountains outside Fort Davis, Texas, at an elevation of over 6200 feet. This site hosts a total of 24 Perky Pet Grand Master hummingbird feeders, and during peak migration can attract hundreds of hummingbirds from a dozen species that are migrating through the arid mountains.