1st cyle Iceland (Thayer's) gull or Herring Gull? Dallas (1 Viewer)

[bird_shine]

I took photos of two 1st cyle herring gulls in Dallas, Texas on 11/13. Turns out a checklist reported 20 minutes earlier had a 1st cycle Iceland (Thayer's) gull on it at the same location. Our checklist both only had two 1st cycle gulls others being an adult lesser black-back and all others being franklins and ringbilled.

I know the last picture is the herring gull, but im not sure if the other gull (pictures 1-3)is the Iceland gull?

Thanks







This is the herring gull for reference:

 

[tom baxter]

The round head in the first 3 photos is very suggestive of Iceland gull. It is clearly different in structure than the herring in the last photo.