FLIGHT SPEED OF BIRDS 13 



(81) WlNKELWERDER, H. A. 



1902. SOME RECENT OBSERVATIONS ON THE MIGRATIONS OF BIRDS. Bull. 



Wis. Nat. Hist. Soc. 2: 97-107, illus. 



(82) WlTHERBY, H. F. 



1928. a transatlantic passage of lapwings. Brit. Birds 22: 6-13, illus. 



(83) Wood, H. B. 



1923. the speed of flight in birds. Bird-Lore 25: 121. 



(84) 



1933. flight speed of some birds. Auk 50: 452-453. 



(85) Wynne-Edwards, V. C. 



1931. the behaviour of starlings in winter. Brit. Brids 24: 346-353, 

 illus. 



(86) YOUNGWORTH, W. 



1936. THE CRUISING SPEED OF THE GOLDEN PLOVER. Wilson Bull. 48: 53. 



