On Thursday, November 3, 2016 at 6:43:22 PM UTC-7, Ben Coleman wrote:
Our club is discussing what we can do to deter birds from perching in our hangar and messing up our aircraft. Can anyone recommend a technique? Are there any methods which have not worked?

The birds are small, probably swallows.

Thanks Ben

I installed bird netting to the underside of the rafters effectively taking away the perching areas. Birds disappeared from the hangar.