A LABRADOR SPRING 
diving birds, for there are many and of numerous 
kinds to be found there. It is evident that these 
birds may be divided into two main classes, 
those that habitually use the wings alone under 
water, and those that use the feet alone. 
Those that use the wings make ready before 
they disappear below the surface by spreading 
or flopping them out, while the feet-users keep 
the wings tightly clapped to the sides, and they 
often execute graceful curves in diving, some- 
times leaping clear of the water. 
The puffin is a good example of the former 
class, and its wings are plainly to be seen in 
vigorous use as it goes under water, and it often 
comes out of the waves flying, only to return 
to the denser element again with the same 
method of propulsion. All the other members 
of the auk family dive in the same way. I 
have twice had excellent opportunities to watch 
dovkies or little auks swimming close at hand 
under water, and plainly saw them use their 
wings. The great auk, long since extinct, with 
wings reduced to flipper-like proportions, doubt- 
less advanced rapidly through the water by 
the action of these extremities only, for the feet 
in the living members of this group are not 
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