We recently moved to Northern Wisconsin on a small 25 or so acre lake. There are two other properties on the lake. Last year we saw and heard one loon at various times during the summer. A month or so ago a single loon returned, usually landing late afternoon/early evening and then departing early morning around or after sunrise. We assumed it was a juvenile or young adult. A couple of weeks ago there were three loons on the lake and then this past week another joined this group. Tonight the lone loon arrived about 6pm and then about an hour later two more joined, then 45 minutes later another, and then 10 minutes later the fifth flew in. The all joined together swimming together without any unusual behavior and what seemed to be feeding. Five loons together seemed unusual in our limited experience here. Then just before dark a sixth loon landed, but this one was not as welcomed by the other five. Lots of wing flapping, chasing, and tremolo calls. The sixth loon seemed to be trying to get off the lake or maybe just trying to get away from the others, but it was dark enough that maybe it could not find the right take off path in the dim light on this small lake. There continues to be lots of tremolo calling tonight so I assume someone is not happy with the mix of birds on the lake. Anyway, seems odd that this many loons are on our small lake when we are surrounded my much larger lakes where they could all find a spot.