Key to Genera, Species, and Sub-Species 1 1 



42 (1) Feathering of forehead does not project into base of upper 



mandible. Base of upper mandible slightly swollen and 



wrinkled. Huge bill wholly black. Tarsus considerably 



shorter than middle toe without claw ; feet orange. Genus Cygnopsis, Brandt (1836). 



Over back of neck stretches coffee - brown bar. Foreneck 



whitish. Along base of upper mandible runs narrow white 



stripe, often with strong rusty tinge (adults) ; in young birds, 



only traces of this white stripe, and bill much shorter. 

 Bill along culmen (adults) 75-100 mm. ( = 2.95-3.93 ш -) '> 



wing 405-470 mm. ( = 15.90-18.50 in.). C. cygnoides, Linnaeus. 



In using this Key the reader must understand that cross-references are the essential feature. For 

 instance, when studying No. 1 (42) he must refer for comparison to No. 42 (1). In this instance he will 

 find that in No. 1 the frontal angle forms an arch, etc. ; but on turning to No. 42 (1), it will be seen that 

 the frontal angle does not form an arch. Again, taking No. 2 (31), it will be seen that the feet are of 

 different colours, but never black ; while under No. 31 (2), it will be seen that the feet are always black. 



