252 TROPICAL WILD LIFE IN BRITISH GUIANA 



Secondaries all new, full-grown, except from the 8th 

 inward which were still growing. 



RECTRICES 



Left 5432112345 Right 

 Old New New New New New New Old New Old 



full- sheath full- 1-3 1-3 full- full- 



grown grown grown grown grown grown 



4. 



Formula of tail molt: j> j 3 5 



COMPARATIVE MEASUREMENTS 



Middle 

 Weight Length Bill Wing Tail Tarsus Toe and Claw 



5 day chick 78 grams 176 14 22 32.5 32.5 



60 day chick 1 Ib. 266 22 107 15 52 46 



Adult ... 2 Ibs. 540 40 270 115 122 95 



