The scientific name of Eastern Kingbirds is Tyrannus tyrannus, Tyrannus means "tyrant" and they are well named because they will harass any bird that comes near their nests including crows, ravens and much larger birds like hawks.
During my travels in Montana earlier this month I saw loads of Savannah Sparrows and although there were many in southwestern Montana I only photographed the ones on the farm in Glacier County.
Western Kingbirds appear to have had a wonderful nesting season here in Utah because there are plenty of young birds perching on wires and branches loudly demanding food from the frazzled looking adults.