I'd heard alot about 'bug-boxes' so finally got around to buying one. I've an established pond which is tadpole/frog friendly as it;s perimeter with logs and plants around it. I'd heard that bug-boxes help the insect population leading to a healthy, balanced wildlife-friendly area. I put up the bugbox about 3 weeks ago and already a few of the 'tunnels' have been filled with some thing white - i've no idea what it is..a fungus..somekind of cocoon? I just wondered if anyone knew what it might be? Pictured below. Any comments, suggestions or what I might expect to start living in there most welcomed!