Ulmus alata, Pursh, Flor. Amer. vol. i. p. 200. Mich. Arbr. Forest. de l'Amer. Sept. vol. vi. p. 275. Pl. 5.—Pentandria Digynia, Linn. Amentaceæ, Juss.
Twigs winged on two opposite sides with a corky substance; leaves oblongo-oval, acute, nearly equal at the base; fruit downy and ciliated. This species of Elm occurs only in the Southern States, where it grows by the sides of rivers and in marshes. It attains a height of from thirty to forty feet.
THE LOUISIANA WATER THRUSH.
Turdus ludovicianus.
PLATE XIX. Male.
Much and justly as the song of the Nightingale is admired, I am inclined, after having often listened to it, to pronounce it in no degree superior to that of the Louisiana Water Thrush. The notes of the latter bird are as powerful and mellow, and at times as varied.
This bird is a resident of the low lands of the States of Louisiana and Mississippi, and is to be found at all seasons in the deepest and most swampy of our cane brakes, from which its melodies are heard to a considerable distance, its voice being nearly as loud as that of the Wood Thrush. The bird may be observed perched on a low bough scarcely higher than the tops of the canes, in an erect attitude, swelling its throat, and repeating several times in succession sounds so approaching the whole two octaves of a good piano-forte, as almost to induce the hearer to imagine that the keys of that instrument are used on the occasion. The bird begins on the upper key, and progressively passes from one to another, until it reaches the base note, this last frequently being lost when there is the least agitation in the air. Its song is heard even in the winter, when the weather is calm and warm.
I have taken the liberty of naming this first songster of our groves after the country which has afforded me my greatest pleasures, not, however, as I trust I shall prove in the sequel, without having assured myself that in habits, and somewhat in colour, it differs from its kinsman the Common Water Thrush.
The Common Water Thrush is at all times, and in every situation, shy even to wildness. The Louisiana Water Thrush is so gentle and unsuspicious as to allow a person to approach within a few yards of it. The species met with in the Eastern and Northern Districts during the spring months only, has its feet of a clear and transparent flesh-colour, and its tail even. The Southern bird, on the contrary, has the feet of a deep bluish-brown, and the tail forked. Never have I seen it wade through water, although it is always near and over it; while in the bird of the Northern Districts this is a prominent habit. I may add, that I never heard the latter species sing, but merely utter a single smart twit, when started by surprise. It moreover frequently feeds on minute water-insects, none of which I have ever been able to discover on dissecting the present species.
The flight of this bird is easy, and continued amongst the trees, just above the canes, or closer over the ground, when it is passing along their skirts, gliding smoothly through the air. When alighted, its body is continually vibrating, the tail being at the same time alternately jerked out and closed again. It walks prettily along the branches, or on the ground, but never hops. It feeds on insects and larvæ, often pursuing the former on wing, as well as on the ground, yet in seizing them it does not produce the clicking sound heard from the bill of Flycatchers.
I think its proper station in a general system would be between the Golden-crowned Thrush and the Water Thrush. Its location, however, I leave to the consideration of better ornithologists than myself.