92 THE ZOOLOGIST. 



General Geographical Distribution. 

 Eegarding the general geographical distribution of the 

 Aquatic Warbler, Saunders details it as follows: — "The Aquatic 

 Warbler seldom visits Heligoland ; though it breeds sparingly 

 in the southern parts of Denmark, Schleswig-Holstein, and on 

 the southern side of the Baltic. In Holland and Belgium it is 

 of rare occurrence ; but in France it is found annually in the 

 departments of the Somme and Nord. In the Brenne and 

 beyond the Loire it arrives about the third week in April to 

 breed ; while further south in the Camargue, and similar 

 marshy districts, it is not uncommon. Eastward it is fairly 

 distributed throughout Germany, becoming abundant in Silesia, 

 as well as in some parts of Poland, and only less so in Austria- 

 Hungary. It breeds in many parts of Italy, Sicily and Sardinia, 

 but in the Spanish Peninsula I have obtained it only in 

 September. In North Africa it is probably resident. In the 

 eastern portion of the basin of the Mediterranean it appears to 

 be only a migrant or a winter-visitor, and the marshes of the 

 Southern Ural form its boundary in that direction." * In 

 conclusion, it may be noted that while the Aquatic Warbler is a 

 species whose fly lines on migration appear to lie east and 

 somewhat south of our isles, it nevertheless reaches and breeds 

 in as high latitudes, e. g. Denmark and Schleswig-Holstein. 

 And so we may expect to find it extending its flight westward, 

 and turning up at light-stations with increasing frequency, as 

 the workers on bird-migration go on adding to their numbers, 

 and the light-keepers become more and more vigilant, and learn 

 to discriminate better between common and rare birds. 



Explanation of Plate. 



Fig. 1. — Sedge-Warbler. Adult male, showing dark smoky buff and 

 blackish streaks on head. Fig. 2. — Sedge-Warbler. Immature male, show- 

 ing dark type of buff and blackish streaks on head. Fig. 3. — Sedge -Warbler. 

 Immature female, showing light type of buff and blackish streaks on head. 

 Fig. 4. — Sedge-Warbler. Immature male, showing broad buff line on head, 

 simulating plumage pattern on head of Aquatic Warbler. Fig. 5. — Aquatic 

 Warbler. Immature female, showing broad medial buff line on head. 



* ' Manual of British Birds,' second edition, 1899, p. 88. 



