[Tin; Keys.] 94 



KEY No. 7 --INDEX COLOUKlNG OF LOWER PLUM- 

 AGE, FLANKS (SIDES OF BODY) AND UNDER 

 TAIL-COVERTS. 



1. Hiiving Lower plinnafje and sides of body of one 

 uniform colour thruughon.l — 



Spotbill. 

 Marbled Duck. 

 77. llavin;/ lo'ier p'nmdgr. <tnd sidfs of hod y different — 

 All the True Ducks except the Marbled Duck. 

 The Pochards. 



7. II iviiK/ the under tiil-covert> bl(\ck (in the Male). 

 All the True Ducks (except the Garganey Teal). 



II. Having the laii-covtrta barred aciobs — 

 Marbled Duck. 



