Several varieties of lizards and frogs abound; the latter make an astonishing noise in marshy places during the summer evening by their harsh croaking. The land crab is found on the northern shore of Lake Erie. A small tortoise, called a terrapin,[198] is taken in some rivers, creeks, and swampy grounds, and is used as an article of food. Seals have been occasionally seen on the islands in Lake Ontario. Insects[199] are very numerous and various, some of them both troublesome and mischievous: locusts or grasshoppers have been known to cause great destruction to the vegetable world. Musquitoes and sand-flies infest the woods, and the neighborhood of water, in incredible numbers, during the hot weather. There are many moths and butterflies resembling those seen in England. The beautiful fire-fly is very common in Canada, their phosphorescent light shining with wonderful brightness through the shady forests in the summer nights. The lakes and rivers of Upper Canada abound in splendid fish of almost every variety known in England, and others peculiar to the country: sturgeon of 100 lbs. weight are frequently taken, and a giant species of pike, called the maskenongi, of more than 60 lbs. The trout of the upper lakes almost rivals the sturgeon in size, but not in flavor. The delicious white-fish, somewhat resembling a shad, is very plentiful, as is also the black bass, which is highly prized. A fresh-water herring abounds in great shoals, but is inferior in delicacy to the corresponding species of the salt seas. Salmon are numerous in Lake Ontario, but above the Falls of Niagara they are never seen. FOOTNOTES: [Footnote 151: "The neighborhood of Quebec, as well as Canada in general, is much characterized by bowlders, and the size and position of some of them is very striking. There are two crowning the height which overlooks the domain farm at Beauport, whose collective weight is little short, by computation, of forty tons. The Heights of Abraham also are, or rather were, crowded with them; and it should never be forgotten that it was upon one of these hoary symbols, the debacles of the deluge, as they are supposed to be, that the immortal and mortal parts of two heroes separated from each other. It has often occurred to us, that one of the most suitable monuments to the memory of Wolfe and Montcalm might have been erected with these masses, in the form of a pyramid or pile of shot, instead of burying them, as in many instances has been done, in order to clear the ground."--_Picture of Quebec_, p. 456.] [Footnote 152: Gray says, in 1809, that "no coal has ever yet been found in Canada, probably because it has never been thought worth searching after. It is supposed that coal exists in the neighborhood of Quebec; at any rate, there can be no doubt that it exists in great abundance in the island of Cape Breton, which may one day become the Newcastle of Canada."--P. 287.