“ BCLIPSE” PLUMAGE IN THE MALLARD. 31 
Text-figure 1. 
The Mallard (No. 18) as it appeared on August 27th, 1907; castrated in 
December 1906. 
The eclipse is far from complete, z. e. it has been delayed by the castration; the curl 
feathers have not as yet been lost, nor has the white ring on the neck fully 
disappeared, etc. 
Text-figure 2. 
€ RES 
Normal Mallard in full winter, or non-eclipse plumage. 
