106 GLAUCOUS GULL. 



white, mottled with pale yellowish brown; back, dull white and 

 pale yellowish brown intermixed. 



The wings barely reach to the end of the tail; greater and 

 lesser wing coverts, dull white mixed with pale yellowish brown; 

 primaries and secondaries, greyish white, the shafts white; 

 tertiaries, barred across with pale brown, the tips greyish white. 

 Tail, yellowish brown, irregularly spotted; upper and under 

 tail coverts, dull white, barred with pale brown. Legs and 

 toes, dull yellowish red. 



After the second moult the spots and bars decrease in size, 

 the white advancing upon them; in the half-yearly change 

 the upper part of the back acquires a few of the grey feathers, 

 and the under parts and tail become white. The adult plumage 

 is taken after the next moult, namely, at three years old. 



