Dendroica petechia aureola

Yellow Warblers are fairly common in the Galapagos. These two were a curious pair, however, both
females who decided to fight over something. They would fly around in the air fighting, and here
they locked grips with each other and fell to the ground, each holding a foot on the other's beak.
While all this was going on, a male was sitting off in a bush to the side watching the fireworks.