Thoreau writes in his journal:
Nest of a Maryland yellow-throat by Utricularia Pool in a tuft of sedge ; made of dry sedge, grass, and a few dry leaves; about four small eggs, a delicate white with reddish-brown spots on larger end; the nest well concealed. At the last small pond near
Well Meadow, a frog, apparently a small bullfrog, on the shore enveloped by a swarm of small, almost invisible insects, some resting on him, attracted perhaps by the slime which shone on him. He appeared to endure the persecution like a philosopher.