https://mednovanhatrang.vn/goi....-xet-nghiem-tam-soat
https://mednovanhatrang.vn/goi....-xet-nghiem-tam-soat
Purple martins are the largest swallows in North America. They are aerial insectivores that eat a variety of insects including mosquitoes, wasp, gnats and grasshoppers. These birds are able to consume up to 2000 insects each day. Native American Indians knew about this insect control and for thousands of years hung hollowed out gourds where the birds would nest. The birds became tame and learned to fly over the Indian villages,
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