HOW TO USE THE GUIDE xiii 



Cause of 

 Bird. increased Approximate Number 



length. len th - m ulde ' 



Long- tailed Titmouse. Tail . . 5f .. 35 



Swallow . . . Tail .. 7| .. 70 



Pied Wagtail . . Tail .. 7J . . 72 



Dunlin . . . Bill .. 8 .. 79 



Common Snipe . . Bill . . 10J . . 109 



Magpie . . . Tail .. 18 .. 170 



Curlew . . . Bill .. 21-26 .. 195 



Pheasant . . . Tail . . 35 225 



Common Cormorant . Neck . . 36 . . 228 



All birds are placed in the tables according to the size 

 of the male. As a rule there is little difference between 

 the sexes, but it is important to notice that among 

 the Hawks (Falconiformes) the female is generally the 

 larger bird, whereas among the ducks the female is 

 often considerably smaller than the male. There is only 

 one species among the Waders (Charadriiformes) in which 

 there is any important difference in size between the 

 sexes, i.e. the Ruff (118); in this case the male is con- 

 siderably larger than the female, which is known as the 

 Reeve. 



