A Western Tanager was sitting atop a tree, a perch that allows it to glean insects.
Elsewhere on the tree was a Cedar Waxwing, a slightly heavier bird.
The tanager looked down and saw the waxwing coming after it.
“Hey, I know waxwings don’t eat other birds, and I thought that you aren’t even territorial—so, what the…?”
“Oh well, I’m out of here.”
Gary Davidson pointed out that the bird I thought was a Yellow Warbler was actually a Western Tanager, so a correction has been made