Info about the difference between eastern kingbirds in North American summer vs their 'winter' in South America, if you're interested: "During the summer the Eastern Kingbird eats mostly flying insects and maintains a breeding territory that it defends vigorously against all other kingbirds. In the winter along the Amazon, however, it has a completely different lifestyle: it travels in flocks and eats fruit." [Cornell]
That's pretty interesting information about their summer & winter habits - do love watching them in attack mode on the insects around here - quick little boys! Beautiful shot against that sky.