Ruby-crowned kinglet
Rondeau Provincial Park, Ontario, Canada, Sept 27, 2021. Difficult to get a clear image of this bird as it flits around never seeming to stop for longer than a second. Corthylio calendula A tiny bird seemingly overflowing with energy, the Ruby-crowned Kinglet forages almost frantically through lower branches of shrubs and trees. Its habit of constantly flicking its wings is a key identification clue. source- Cornell Lab of Ornithology.