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Wait, did that guy say this is reversible? Like hell! Evolution never reverses. If people stop feeding the birds, they will simply die. If they are diverging from their parent species, it will be an extinction event, not a reversal in evolution.
It might be very interesting to study an actual extinction from divergence to end, but that's rather cold hearted (I know, the English ARE cold hearted, but even for them!). I say let the people enjoy the relationship, provided it is beneficial to both.
*side note: We just put up a bird feeder and have a mating pair of Cardinals using it. The male and the new fallen snow is quite a combination of holiday theme. Plus, the house cat is giddy with excitement.
Permalink Sun, 06 Dec 2009 00:44:00 UTC | #420551