H.C. Richter and J. Gould. Herran's Thornbill [Rainbow-bearded Thornbill]. Ramphomicron herrani [Chalcostigma herrani].
Original lithograph with later hand-colour for Gould's 'A Monograph of the Trochilidae or Family of Humming Birds', 1849-61. 530 x 360 mm.
#2050660