I am a french ornithologist (attaché to Paris museum) and just having published a Monograph of the Finches (Vol.1). Now i am working on the Vol. 2 with all the Carduelis. In this way, i would like to reproduce two beautiful photos of yours of the Yellow-bellied Siskin. My book is much oriented to conservation, natural history and illustrated by photos taken only in wild. Would you agree? In return, if you are interested, i will send you the Vol. 1 (by mail in 5 parts: about 500 pages and about 500 photos).
All the best