I was so excited the other day. I was out birding on a high mountain in the snow and saw a plover in a mud puddle in the ditch. I got some shots of him but didn't know what it was. I looked in my Peterson west guide and the only one with a yellow eye is the Little Ringed Plover. It says it's rare and only in the Aelutians at times. I was excited as I found him on a mountain in Washington state. My first rare bird.
Then I looked on this site at other little ringed plovers and the yellow eye is much more pronounced. I then did a search on plovers and found other images on here that show it's the semipalmated plover. While still a fun bird, I did notice my Petersons says it doesn't occur here but migrates through. Still a fun opportunity but a good example of why I can't rely on my field guide and how this site is a great resource for bird Id.