Fig. 2From: The effect of weather on the decision to migrate from stopover sites by autumn-migrating ducksFrequency distribution of the direction that the winds aloft (433 m Above Ground Level) are blowing toward at 0000 GMT on each night included in our analysis (left) compared to the frequency distribution of the direction that winds aloft are blowing toward at 2400 GMT on a sub-set of nights on which we observed a departure eventBack to article page