I think I have figured out why this bird is called a violet-ear I've been in the hummingbird aviary at the zoo a lot. I've seen this bird pretty much every time. Today was the first time I saw it do this. Another bird was getting a drink or something above it and it got mad. These ear-flaps suddenly flipped up and it chittered up a storm.
Hummingbird was released to go to the 4 cardinal points to report on what was seen; the 4 posts were placed beneath the points to support the earth; the 4 colors of the posts were black, blue, yellow, and white. Wind carried the posts and placed them.