Smile

While I've not done any rigorous content analysis of bird images posted online, I'm guessing that the most photographed birds are ducks. One reason is that, in North America, they occupy ponds in most parks and they are not particularly camera shy. But I suspect an even greater reason for their popularity is that they always seem to be smiling. Even a duck that might be considered homely like this Muscovy, wears such a pleasant expression on its face that it's a pleasure to look at. Makes me think I'll have to remember to smile more often.