This spectacular bird sports the typical woodpecker red on its head and spots on its front, but the tail feathers and underwing feathers are bright yellow. It has the black bib you see and the males, such as this one also have a black mustache. Most often I just see it from the back, fleeing me, where it is merely brown with a bright white patch on its rump. It is a woodpecker, but it seems to specialize in ants and is often digging in the ground with the robins.
This one was perched in the tree while a robin came by for a bit and then a bunch of starlings, Finally he had had enough and took off.