Do they know that there are invasive species that have been consuming the U.S. for thousands of years?
Almost all grasses are brought over by the Spanish, very few true prairie grasses still exist that were native to the continent.
Same with birds. European Starlings have taken over the North American continent with numbers in the millions.. all because of a Shakespeare enthusiast who released all birds mentioned in Shakespeare Literature into the U.S. in 1890 and 1891. Most Sparrow species are also non-native. Starlings have killed off thousands of native birds and some are even extinct due to their highly aggressive nature.
Feral cats do more damage to the environment than burms ever have.
North American wild horses are almost gone in the wild, and all of the horse species we ride and race and often see in the wild are not native.
People need to understand that things we often overlook as being native, are actually not at all.
Some of you may find this interesting:
http://www.invasive.org/
There will always be extinction as long as humans are around to move species back and forth as well as themselves.
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