So, my question today is how many moths does it take to make a colony?

I passed through Lavernock Nature Reserve again yesterday and found two more Jersey tigers (Euplagia quadripunctaria). I can tell neither of these is the same as the one I saw three days earlier because the spots on their wings are all different (see inside bottom edge of right wing in these photos of all three, as shown below). I’m hoping this means there is now a colony of Jersey tigers becoming established in the reserve, rather than immigrants all arriving at the same time.