Was a nice day for whatever is going on here. More of them tried to get in on the action but moved on (or pehaps they were moved on). Another joined later on somewhere in the middle of the group. It’s hard to describe and the video I shot isn’t very clear. It joined the group from one end, moving it’s legs (or interlinkinging them?) one and then two and then three and then four and then five and so on at a time. This include the one that was ‘on top’ having to do the same as the joiner shimmied it’s way into the group.