This video from the USA says about itself:
Immature Male Rivoli’s Hummingbird Shows True Colors – July 25, 2017
When the light hits just right, a molting immature male Rivoli’s Hummingbird shows off his magnificent teal gorget and purple crown.
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.