|A bit of a squeeze! Photos Clarke Brunt|
On April 29th, while commissioning the attraction calls on the Cambridge Swift Tower, upgraded to a 20 watt solar panel, car battery and Cheng Sheng player, as described here, we discovered the first occupant.
Of course, we cannot be sure that this entrance, at the top of the tower, has not crept over the 30mm limit, but the somewhat squashed shape of the bird, emerging from the box, shows it to be a bit of a struggle.
We know that Swifts can get into a slot as small as 24mm across - though the other dimension is considerably larger than this. Thus, if you are really determined to keep all Starlings out, even the most determined Starlings, then perhaps aim for 28mm, and this should still be an easy entry for Swifts.
Nevertheless, we are rather pleased that this enterprising Starling is making good use of a penthouse suite in our Swift hotel!
For all posts and pictures of the tower see here.