You should also include dogs in your list of damaging things:

https://www.newscientist.com/article/mg25433840-800-how-a-bi...

"Birds, it turns out, seem to be particularly sensitised to dogs – even on leads. In woodlands outside Sydney, for example, a study found that people walking leashed dogs caused a 'dramatic' reduction in the diversity and abundance of birds – more than double that caused by the same number of people walking without pets."