AN INTRODUCTION TO THE BIRD. 215 
(8) It may have the nostrils ordinary and the 
beak with a distinct angle on its lower edge (where 
the taper starts toward the point of the lower prong), 
and webs between the three front toes only. Or pos- 
sibly the lower prong of the beak is much longer than 
the upper. Then your bird is one of the Gui1 forms. 
Some other birds have this style of beak, but then 
the nostrils are tubular, or the rear toe is webbed to 




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A foot and some bills of the gull forms. 
the inner, or there are no useful webs at all on the 
foot. 
(9) If the bird has tubular nostrils and webbed 
front toes it is surely a Perret form. In the last 
two groups the wings are very long. 
For ducks, geese, swans, and flamingoes alone 
have fringed or toothed beaks, combined with webbed 
feet and ordinary nostrils. If you find a bird with 
