This is a female Ruby-throated Hummingbird that I observed over a two-day period at the local arboretum. She had competition and was not going to concede in any way, shape or form. Her feistiness was inspirational. A female warrior. She didn't care that I stood close by. No, this girl had a one-track mind: keeping the competitor away from her flower patch. What a treat this was and worth the sunburn and mosquito bites.