This video from the USA says about itself:
23 September 2016
This male Lucifer Hummingbird, curved bill and all, remains anchored to his feeder port despite all of the birds hovering around him. Did you know that some of the hummingbirds we see on cam have an average wingbeat frequency between 50-60 times per second when they’re hovering!? Their small size allows them to generate lift by using both backward and forward wing motions to “float” in the air and feed on nectar.
Watch live at http://AllAboutBirds.org/TexasHummers.
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.
For the past 10 years, researchers from West Texas Avian Research have been banding hummingbirds at this site and others throughout the Trans-Pecos region of Texas to study the status and distribution of hummingbirds throughout the poorly known region.