Thoreau writes in his journal:
Pasture thistle, not long . . .
P.M.—To Walden for hydropeltis . . .
Saw at Hydropeltis Meadow a small bullfrog in the act of swallowing a young but pretty sizable apparently Rana palustris, such as now hop about, an inch and a half long. He took it down head foremost, and as the legs were slowly taken in,—stuffing himself,—for the legs were often straightened out,—I wondered what satisfaction it could be to the larger to have that cold slimy fellow, entire, lying head to tail within him! I sprang to make him disgorge . . .