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Originally Posted by Argosy
I guess I have a different perspective. I grew up on a dairy farm and still live in a fairly sparsely populated area. From my life experience your arguments don't really take into account modern farming or the balance of nature.
Bird seed is agribusiness, huge fields tilled every year and planted with commercially grown seed. How does an invasive species get a foot hold in a field tilled yearly? How does it make it through the combine used to harvest? They use air and different sized screens to separate the grain from the trash. The invasive species seed would have to be nearly identical in size to the grain being harvested. Modern crops have been developed for shorter growing seasons because of early and late rains, it's not likely an invasive species would mature that quickly. I don't see spreading invasive species as a plausible argument.
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This is a little off, and not exactly how it's grown. This is a whole 'nother topic. Farms are full of non-native species, and they take great pains to kill certain native species. Modern farming is not a good example of best practice.
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