They search for food precisely in the manner of the roseate spoonbill, moving their heads to and fro sideways, while their bill is passing through the soft mud; and in many instances, when the water was deeper, they would immerse their whole head and a portion of the neck, as the spoonbill and red-breasted snipe are wont to do. When, on the contrary, they pursued aquatic insects, such as swim on the surface, they ran after them, and on getting up to them, suddenly seized them by thrusting the lower mandible beneath them, while the other was raised a good way above the surface, much in the manner of the black shear water, which, however, performs this act on wing. They were also expert at catching flying insects, after which they ran with partially expanded wings. Doctor Wetmore (1925) found that, in 67 stomachs examined, animal food amounted to 65.1 per cent and vegetable food 34.9 per cent. Among the animal food were found phyllopods, dragonfly nymphs, back swimmers, water boatmen, various beetles and flies and their larvae. The vegetable matter consisted largely of seeds of marsh or aquatic plants. He says further: Flocks of the birds search for food scattered about in shallow water, and do not hesitate to swim when necessary in crossing the deeper channels. Frequently a dozen or more feed in company, walking slowly along, shoulder to shoulder, as though in drill formation, at each forward step thrusting the head under water and sweeping the recurved bill along the bottom with a scythelike swing that must arouse consternation among water boatmen and other aquatic denizens of the bays and ponds. At times the writer has observed as many as 300 of these handsome birds feeding thus in a single company, a scene at once spirited and striking. As the birds feed much of the time by immersing the head, anything that may touch the bill is gathered indiscriminately, as in feeding they depend upon the sense of touch. From their manner of feeding, avocets are often scavengers, taking living or recently dead prey without much choice. The large tapeworms found almost without fail in the duodenum of the avocet are transmitted from one bird to another in this manner. The cast-off terminal segments of the worms (bearing the eggs) are picked up and swallowed by other avocets, a proceeding which the writer has personally observed. Avocets also pick up matter floating in the water, on or near the surface, or take insects and seeds from mud bars. The insects may be those living in such localities or may be individuals that have been washed up in drift. Other observers have reported avocets as feeding on grasshoppers, predaceous diving beetles, crickets, centipedes, weevils, small snails, sea slugs, small crustaceans, and even small fishes.