If you're eating from a feeder, possibly.

 

Give a bird a seed, you feed it for a day. Give a bird a bird feeder, and you start driving its evolution. Who knew?

Scientists didn’t, at least not until they started studying the migratory patterns of Central European blackcaps in southern Germany and Austria. The small gray birds that summer there traditionally winter on the Iberian Peninsula, fleeing the nutritionally sparse region for the lush olives and fruits of sunny Spain every year. But in the 1950s, a small part of the population began overwintering on the British isles instead of Spain. It seemed like a case of different strokes for different songbirds, until German scientists discovered in 1992 that a genetic basis for the behavior had developed. The light cues that send the birds back to Germany each year come earlier in… More…