American Tree Sparrow.
A standard winter resident in our yard over the winter. A handsome little bird. Rondeau Provincial Park, Ontario, Canada, January 15, 2025. Spizelloides arborea. American Tree Sparrows need to take in about 30 percent of their body weight in food and a similar percentage in water each day. A full day's fasting is usually a death sentence. Their body temperature drops and they lose nearly a fifth of their weight in that short time.