Loon sp at Penasquitos Lagoon 4/17

Steve Perry
 

Hello,
Yesterday at Penasquitos Lagoon I saw this loon swimming in and out of the river mouth. I think it is a red-throated loon, but would appreciate input with key identification features. Sorry for the poor quality images.
Also present were Western and CA gulls, Caspian and elegant terns, an eared grebe and about 30 brown pelicans and other usual suspects.
Steve Perry
Solana Beach


https://www.flickr.com/photos/136413504@N07/shares/M07kN9

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