Rufous to Silver
Something Adam Hutt pointed out to me a while back. How the plumage of juvenile Sand Martin varies. I got chance to see it up close and personal last week. Basically the commonest pattern on juvenile Sand Martins is of a warm brownish to rich rufous-brown fringes to the upperpart wing and tail feathers. However every so often you encounter a ‘Silver Guy’ on which the warm brown/ rufous is replaced by gleaming cold silvery white. The Silver Guys seem a lot less common and in my little sample I didn’t see and cline from one to the other but it was only a few birds.
Variety in birds is wonderful. Keep an eye out for the Silver Guys. Hopefully you can see what I mean below. Taken Spurn, August 2011.
Guided Birding Pages
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plus articles on Stejneger’s and White-winged Scoters, Yelkouan Shearwater update, The ID of the Albert Village Lake ‘Mew Gull’, Eastern Jackdaws in Britain, Yellow-billed Kite, Eastern Bean Geese.
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