Blue sky thinking

Sky-blue sky over the Common today as I stood dazzled by the sun reflecting off the Great Pond. A heron stood statue-like on the shore, then flew over the water like some prehistoric beast. Further on I spotted an unlikely buttefly fluttering through the bare twigs of a tree. I may be going mad but I'm pretty sure it wasn't a leaf - probably a red admiral woken briefly from hibernation. Overhead a flock of long-tailed tits called my attention with their metallic tweets.