926 Col. R. Meiuertzhagen on the Altitude [Ibis, 



Rooks and Jackdaws. 690 feet. Flock of over 200 mixed 

 birds flying west on a clear evening. 



Green Plover. 1410, 4346, 6210, and 6870 feet. All in 

 flocks and flying south-west soon after daylight 

 in early October. Weather calm and clear. 



Geese. 4240 feet. A skein of 17 flying west by south on 

 a clear frosty November evening just before sunset. 



Hooded Crows. Observed passing along the coast near 

 Boulogne, never over 300 feet up. Weather dull 

 but sometimes clear. 



All passage of Larks. Finches, and Buntings was observed 

 at only a few feet above the ground. 



Finally, I give a few scraps of evidence culled from 

 various sources. 



Rooks. High flyers over Heligoland. (Gaetke.) 

 Hooded Crows. Low flyers over Heligoland. (Gaetke.) 

 Slajlarks. Heligoland. They pass Ijctween 1000-2000 feet 



in clear weather, and at 200 feet in damp dull 



weather. (Gaetke.) 

 Richard's Pipit. Their migratory flight is liigh when 



passing Heligoland. (Gaetke.) 

 Pericrocotus cinereus. Southern China. They fly high 



when travelling. (Ibis, 1913, p. 36. J 

 Sotiri-Thrus/i. Heligoland. They fly high in clear weather, 



but low in damp dull weather. (Gaetke.) 



At Jericho on a dull November morning with 



clouds as low as 200 feet, 1 watched hundreds 



di'0p[)ing like stones into a banana plantation soon 



after daylight. They came tItroin/Ji the cloud and 



not from below it. 

 Hedge-Sparnnc. They migrate at 200 feet in Heligoland. 



(Gaetke.) 

 Wren. Patten (Irish Nat. 1912, p. 125) thought they were 



low flyers on migration. 

 Hoopoe. Several seen arriving off the coast of southern 



Palestine, flying but a few inches above the sea when 



about 10 miles from land. 



