Reuters is reporting today that the US-Mexico border fence--the literal one, not that crazy laser one they proposed--is harming the ecosystem that transcends the political borders between these two countries. Not for the first time, mind you--I had this bookmarked months ago, but the link died. Especially at risk are ocelots and, not intuitively, butterflies.
The border fence itself is moronic, from both a practicable policy standpoint and an ecological standpoint. What's next? A moat and black knight patrols? At least the butterflies could skitter across. At this point, though, those backing the fence seem too entrenched to let it go and look for other, more manageable solutions. Until then, looks like the wildlife will have to wait for amnesty programs or file and wait for work permits.