House finches are small, often red-headed birds. Despite their great numbers in Texas, however, this region is not their natural home. They are native to the dry regions of the west. Because of the males’ red coloring, they used to be trapped and sold in the New York area as “Hollywood finches”. Being illegal and not wanting to get caught, the dealers released them around 1940, all in the Long Island area. The House Finches liked it and adapted quickly!
Within two decades, the species expanded to the Carolinas. Eventually, Texas. The rest is history. As you can see in the picture, the males are red & gray; females are gray & black.
I mark trees with bands of brightly-colored "flagging tape" which is used by surveyors. But you can use anything handy. That way, I'm not afraid of cutting down the wrong tree by mistake.