Red-throated Loon

Red-throated Loon -- Arrowhead Marsh, Oakland, CA
Canon EOS Rebel T5i, EF-S 55-250mm f/4-5.6 IS II, 1/2000s, f/5.6, ISO: 500

This is the first red-throated loon I've seen in the estuary.  I almost missed it.  At first glance I thought it was a cormorant and it was a little too far out to try to shoot it.  It seemed a little off, though, perhaps it was a little too small and a little too light in color and riding a little too low in the water.  One or all of these things must have caused me to take a second look.  Sure enough, it wasn't a cormorant.