One sunny day, I was hanging out at Arlington watching the flying activity.  However, planes weren’t the only thing flying.  I looked across at a taxiway light and saw something on top of it.  A look through the long lens and a kestrel came into focus, if only briefly.  Before I knew it the bird had launched into flight and headed away, not to return while I was there.  I was rather pleased to have got something close to a reasonable shot of it in that short moment.