What do Frogs daydream about ?

A frog, seemingly lost in thought, in our pond from several weekends ago.  

Shot with the Nikon D7000 and Sigma 50-500mm lens @ 500mm.  Manual exposure mode, F9, 1/200th second shutter speed, ISO 320, spot metering.  Camera was tripod mounted. Processed in Photoshop CS5 and Lightroom 4.