“The perch swallows the grub-worm, the pickerel swallows the perch, and the fisherman swallows the pickerel, and so all the chinks in the scale of being are filled” – Henry David Thoreau

This was my first encounter with cliff swallows, they build their nests from mud under bridges. Probably used to build them on cliffs but…. This park was in Kingsport, TN.

Can’t say enough about Thoreau, he saw the connections in nature at a time when most folks were just killing stuff.

Quote found at http://thinkexist.com/quotes/with/keyword/swallows/