Gallery: 20101006 – Juvenile Gull November 3, 2010October 6, 2010 by matt goff Note the two-toned look to the primaries. [Show slideshow] Juvenile Thayer's Gull (Larus thayeri) feeding in Indian River. Juvenile Thayer's Gull (Larus thayeri) feeding in Indian River. Share this:ShareFacebookTwitter