You know it's spring when flocks of birds appear. As my previous post mentions, I always know my birthday is near when I look up to see and hear the long "V's" of tundra swans.
Other flocks that make me look up are snow geese, sandhill cranes and American white pelicans.
I live in a river valley, so spring flocks are common. One morning when I was on my deck enjoying the sun warming the floor boards, I looked at the fast-moving fluff-ball clouds and noticed a large bird flock coming my way.
The flock caught a thermal over my head and I was treated to the salt-and-pepper pattern of the American white pelican.
What I mean by salt-and-pepper is that when the pelicans circle, they appear to change from light to dark -- alternating colors as they turn in the sun. This is a diagnostic feature that helps to identify the flock. It is well known that white pelicans circle on thermals. I enjoyed the sight as I soaked in the sun.