198 BIRDS WITH LONG, CURVED BILLS. 



succession, short, but not abrupt, and very mellow. 

 Hoopoes appear annually on migration, and may 

 occur in almost any part of the country. 



NOTES TO 'BIRDS WITH LONG, CURVED BILLS.' 



CHOUGH. — 16 inches; a clifF-breeder ; entirely black, aiul re- 

 sembling the Rook in form. Although it possesses a rather long, 

 curving, red bill, it has been described under ' Black Birds.' 



TREE-CREEPER.— 4f inches ; brownish above and white below, 

 with long, thin, curved bill ; but because of its habit of creeping up 

 the trunks of trees, described under ' Trunk-Climbing Birds.' 



