Bird Control Safety

Heather, For information on ledge width and angle, the following reserach article has the details: Haag-Wackernagel, D., and Gegienfeind, I. “Protecting buildings against feral pigeons,” European Journal Wildlife Rest 54 (2008):715-721. The summary is: 4-6cm ledge width and for angles, rough material= 60 degrees, Medium rough=40 degrees, and Smooth=30 degrees We even have some interesting in-house research on preferred angles and shapes for roosting. As you can see in the attached image, the birds got their fill of bird seed and peanut butter, while we found a distinct prefernce for angle shape and dimension. I'm happy to share more if you're interested

Roderick, I'd be interested in additional information on your bird testing.  I am working on solutions for a house sparrow problem at home - which I noticed largely due to my work from home setup these past 2.5 months. So far I can only contribute that the most effective measures are physical barriers. The electrified tape seems like a viable commercial building option, but seems slightly counterintuitive to sustainable design on the surface. Laser system looks interesting too but I haven't had any expreince with it. Closest thing we've used is this product at our office, though it's only really effective at night and when the surrounding area is well groomed: https://www.awaywithgeese.com Specifically you probably will want to target the solution to the birds you're hoping to keep away (which can be challenging not knowing specifically what you're going to end up with). More products and information here, which surely you've already found too, https://www.birdbgone.com/blog/how-to-keep-birds-away-from-commercial-buildings/. 

Sarah, I'd be happy to share but I do need to send information directly. Feel free to shoot me an email at rbates at kierantimber.com. Please note that depending upon the species of sparrow, it may be protected by the migratory species act and any nesting disturbance is prohibitted. This definitely makes avoiding the situation in the first place all the more important!

Will reach out via email. I'm certainly a lover of all things avian... just not ones that are invasive (both to the native bird population and literally invading my 99-year old home. ;) Though I do feel generally conficted on house sparrows in general since they were originally introduced by humans in an area they didn't belong anyway (as so many invasive species are). 

On a side note, I'd be interested in specific work others have done to specifically prevent bird-collisions and create more bird-friendly designs - for the LEED Pilot credit or other reasons as well.