We haven't been able to close or lock the door of our workshop for weeks since a couple of swallows decided to make their nest and start a familly in it. We're happy we didn't, six beautiful little birds are now having their residence in a adobe nest above the workbench.
We have a few nests in and outside our house: nice since these birds are truly useful in controlling the insect population;
Swallows feed their nestlings by rolling insects into a compact ball and carrying them back to the nest in their throat. A typical barn swallow will bring about four hundred daily meals, consisting of about twenty insects per meal, back to its brood.