|Don't use a 200mm lens to take photos of birds in the sky. But it was what I had when these sandhill cranes were overhead. As always, click to embiggen.|
"Snow geese," I say to my dining companion (Amtrak uses "community seating). But at the table across the aisle, someone is saying that they are sandhill cranes. I don't think so — they don't fly like cranes, and I have never seen a flock of cranes that big, not even during the evening flight at Bosque del Apache. And the crane migration is pretty much done by now.
I have been writing this blog long enough that I have a bunch of "cranes" entries. In October 2005, standing on a wide, busy sidewalk at Colorado State University-Pueblo and watching a flock overhead, I felt my heart lift, yet I was saddened that no one else looked up. Should I have adopted a prophetic voice? "Behold the cranes, O people, and learn from them!"
A few years later, I was at our little fire station on a warm October day — some of us were working on an engine outdoors — when a migrating flock came over and everyone stopped to watch. I felt better about some of my fellow firefighters that day.
But then I recently heard some long-time locals speak of geese flying over on the same afternoon that I took the picture of cranes chasing a thermal. Just not paying attention? (Shades of the Dances with Wolves soundtrack error.)
Cranes are cumbersome flyers. They prefer to migrate during daylight hours, when the thermals created by the midday sun provide rising air currents which the cranes ride to gain elevation before gliding down to the next thermal. It is this thermal riding which many observers mistake for being lost of confused.
Dale Stahlercker and Martin Frentzel, Seasons of the Crane.