How Do I Get In There Please?

Come on – I’ve opened up most of those entrance holes to double their size – just get in .  .  .
 
Actually he/she was inside a few seconds later.  Mind you before I opened up the entrance holes VERY few found their way in.
 
We have had the best part of a dozen young ones in there in the past, but I’ve never had the camera handy – always the way.