There are a lot of Marsh Wrens at Carlos. But they are extremely difficult to photograph since they spend most of their time down among the reeds, only occasionally popping up to take a look at what's going on. You know they are there from their loud song, but just try to get a glimpse of one. I spent over an hour trying to capture the one on right -- this was my best shot. But I'm not giving up -- "I'll be back!"