Quote:
Originally Posted by wdfifteen
The Ruby Throats that come to Michigan and Ohio get the impulse to migrate based on the sun. No one knows if it is the height of the sun or the hours of daylight. They start to take off sometime in late August and are all gone by mid-October. They double their body weight to around 6 grams getting ready for the trip to Central America, so keep the feeders out for a couple of weeks after you see the last one.
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Well, that explains the feeding frenzy yesterday. I'll keep the feeder out there until they are gone.