I once read that one can tell the weather by how the swallows are feeding.  I can't remember the details other than it is related to how high the insects are flying relative to the air (barometric) pressure.  
Bill Anderson; Edmonds, WA. USA

On Sunday, April 1, 2018, 3:27:51 PM PDT, Josh Adams <xjoshx at gmail.com> wrote:

Hello tweets,As I looked out my window a few minutes ago, I noticed about a dozen swallows skimming right above the surface of the Snohomish river in the rain. I've noticed Swallows tendency to do this in the rain before, especially in early spring, presumably before they've spread out to breeding territories. I've always assumed that the weather results in a higher concentration of food close to the surface of the water, but I can't come up with a reason why that would be. Does anyone have any insight on why swallows feed directly above water during rainy weather? 
Josh AdamsCathcart, WA_______________________________________________
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