No. 55. 



Charadrius squatarola. 



Sometimes confused with the next species, but differing from 

 it in many ways. This is a four-toed plover, having a minute but 

 perfectly distinct hind toe (No. 56 being without this rudimen- 

 tary appendage). It is also larger, stockier, bigger billed, is a 

 less numerous and more timid species, with louder, fuller note, 

 and is found far more often on the sea-shore proper, upon sand- 

 bars, mud flats, and beaches. 



No. 55. Breeding Plumage. 



Adult in breeding dress. Upper part of head and back of 

 neck white, more or less marked with pale grayish brown ; re- 

 maining upper parts mottled with white, black, and two shades 

 of brown ; tail barred with white and black. Lower part of head 

 and most of the lower plumage plain black (or brownish black), 

 changed to white about vent and root of tail. Bill and legs 

 black. 



