Very true, birds are pests and still causing damages to crop yields from farmland to storage spaces. I have seen severally where they cause havoc in palm plantations, where palm leaves are pecked, hence causing serious nutritional issues for these trees.

There are several regulations from international, regional, and national levels on some of these pesticides/herbicides, but this does not out-rightly clamp down on its use. However, POPs (pollutants family), HPPS (hazardous family), and neonicotinoids are on this watch-list. Hope we talk about this sometime here...