I'm afraid I don't get the title in the first place... but I also don't see the relevance to this challenge. Any picture of a seagull is surely going to be "candid" given that seagulls aren't really capable of posing. In a different challenge I would have rated this better.
This photo is 'candid' because I can see that it was not setup and not planned. The 'candid' element of the photo is, in my opinion, weak, because of the subject. I think that the people shots are a bit stronger on the subject because it's easier to show a strong candid moment and create a better tie into the challenge :) - jmsetzler