|MadSci Network: Zoology|
I'm interested in knowing what the bank swallows do with the sand while building their nests. We haven't noticed any sand/dirt under the nests. Do they eat it and digest it later, or do they store it in their beaks and spit it out away from their nests? I have noticed that they go into the nest then fly out and in a circle away from the nest before returning to the nest, then start the cycle again. Can you help solve the mystery?
Re: What do bank swallows do with the sand when they build their nest?
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