Did you know a group of loons is called a 'raft'? I've seen this raft twice recently around the Gate 37 cove area. I suspect they are juveniles, but that's just a guess.
One Loon I caught quite close in Monson Turnpike cove and couldn't pass taking a minute and a half video.

Loon, close up.

Monday, June 11, 2018, 7:31 a.m., 60f.