adjacent to Normal School; on old Lansdowne flying field, a hayfield, about 15 acres, with ploughed stubble adjacent; fully 40 Skylarks, scattering; much flying cloft, in 3's or pairs, pursuing one another; other notes reminding me most of the Twittering of tree-swallows. Some go for up and circle, then dive down or set wings; but only incomplete song now, Kernode says, as compared with full effort in spring. As a bird rises, it shows white outer tail feathers, and its flight reminds me of horned lark, but still there is a difference. A group, strong along, of 15 by count gets up from ploughed stubble. I walk to about 50 feet of one bird; keeps back (sandy-colored) toward me; bird more fidgety than horned lark under same circumstances. Song at times reminds me of bubbling of purple martins. Mr. Sprot estimates total of 30 to 40 on this one field -- perhaps 200 in general regions; still on increase. Sun comes out warmly and up the skylarks go, with a profusion of throaty twitterings. Other birds heard or seen on this field were: Savannah Sparrows (3 or more