New & Potential colonies - some advice please

[Andrew Turney]

In D&G we have a rural site that installed 8 nest boxes and a couple of callers in 2024 which they have been using as per timing advice morning and evening, they had a small amount of swift interest for a few days, then in 2025 2 birds stayed around for a couple of weeks. On Sunday 24th 2 swifts arrived and are now constantly around the house and garden and going in an out of the boxes, a 3rd swift appeared on 26th.
There is another location that also has installed boxes and a caller, this site is about 2 miles away from the site with the new arrivals.
Is it likely that running the caller at the 2nd site will distract / confuse the birds who have been attracted to the new site and would it be sensible not to use the caller at the 2nd site to let the birds establish themselves at the new site.
Many thanks
Andrew