Dafila acuta. November 21, 1909. The female Sprig has not shed her wing quills yet. November 25, 1909. The female Sprig has shed her primaries. January 30, 1911. The pair of Pintails are in high plumage, the drake having just completed his moult, (being behind time.) all but a few old barred feathers on his back and several whitish feathers in his crissum. February 12, 1911. The drake Pintail seems to be higher plumaged; the crissum is blacker, the long tail feathers have grown. The drake allows himself to be bullied around by the female Feb. 19, 1911. Drake's "spiked tail" increasing in length. March 14, 1911. The female does not seem to abuse the drake as much as usual. He shows off a little by arching his neck and making a sort of hicough, very much as the Mandarin Drake does.