Eye colour of the Hen Harrier D. I. M. Wallace's remarks (Brit. Birds, 65:358-359) on the eye colour of an immature of the American subspecies of the Hen Harrier Circus cyaneus hudsonius at Cley, Norfolk (see Brit. Birds, 64: 537-542), were confusing and to a certain extent incorrect. I quote: '. . . R. A. Richardson wrote to point out that such a bird could not have had yellow irides since these ar
...This article is only available to registered users.
To read more, please log in or purchase a subscription.
