iMinprnoMMOK
RAMPHOMICRON MICRORHYNCHA.
Thorn-bill.
Ornismya microrhyncha, Boiss. in Rev. Zool. 1839, p. 354.— lb . Mag. de Zool. 1840, Ois.,
pi. 16.
Trochilus brachyrhynchus, Fras. in Proc. o f Zool. Soc., Part VIII. p. 16.
Mellisuga microrhynchct, Gray and Mitch. Gen. o f Birds, vol. i. p. 112, Mellisuga, sp. 32.
Ramphomicron microrhynchct, Bonap. Consp. Gen. Av., p. 79, Ramphomicron, sp. 1.
In the accompanying Plate, I have vainly attempted to illustrate this very lovely species, which (strange as
it may seem), always conjures up in my mind a remembrance of the glow-worm, whose evening torch so
charmingly illumines the dark lane-sides of our own country; for indeed in its plumage, a gleam of intense
lustre is contrasted with the tone of the general plumage. The glow-worm shines in the dark, but this bird,
on the contrary, is most glorious in the glare of the sun ; when its throat, opposed to bright light, becomes
transcendently brilliant; the surrounding dark colouring tending to render it more conspicuous: the beautiful
violet-coloured back, relieved by the dark hue of the wings, and the black tail, all combined with the
utmost harmony, and in the most elegant form, renders this bird an object of no ordinary interest. As its
name implies, the bill is remarkably small, and in fact, there is no species yet discovered that has this organ
so diminutive: how minute then must be the insects upon which it feeds, how small must be the flowers
from which they are obtained, and how active must it be to procure a sufficient supply of these microscopic
creatures for the sustenance of life! M. Bourcier informs me that it is a migratory species, and that in
Ecuador, where he had killed many specimens, he had seen it obtaining its insect food from the low composite
plants, with open daisy-like tufts of yellow flowers, growing on the hill sides at an elevation of from eight to
twelve thousand feet, to which it seemed to be so partial, that wherever he found these plants, there he was quite
certain to find the bird also. M. Bourcier adds, that a great number may be killed before adult males in full
plumage are procured, and that the preparation of specimens for the cabinet is very difficult, from the readiness
with which the feathers are detached from the skin. It is usually met with in small companies; flies very gently,
and never rises far from the ground. From Ecuador, which I believe to be its most southern limit, it is
found far to the southward of Santa Fe de Bogota, and doubtless inhabits all the districts between these
distant localities. It will be seen then, that, like its congeners, it is strictly an Andean species. Although
now very common in our collections, it is only within the last few years that the bird was discovered and
sent to Europe.
The adult male has the head, all the upper surface and wing-coverts rich dark shining purple; wings very
dark purplish brown ; tail velvety black; on the throat a large gorget of the most luminous metallic
yellowish green ; under surface bronzy green ; across the vent an irregular band of buff; under tail-coverts
dull bronzy green, edged with buff; bill black ; feet dark brown.
The female has the whole of the upper surface bronzy green; the throat white with a spot of bronzy
green at the tip of each feather; the remainder of the under surface white, washed with bronzy green on
the flanks; vent deep buff; under tail-coverts similar to, but darker than those of the male; tail purplish
bronzy black, the two lateral feathers on each side tipped with white; a white mark in the centre of the
hack in some instances.
It is not yet, I believe, clearly ascertained if the adult female ever has the gorget; in all probability
she has not, or at all events not until after her capability for reproduction has ceased.
In some specimens we find the purple of the upper surface mottled with shining green; the throat mark
only partially developed, the lower part of the abdomen, and the margins of the under tail-coverts white,
and the outer tail-feather only tipped with that colour: the birds in this state, I believe, are males of the
second year assuming the adult plumage.
The Plate represents two adult males, a female, and a young bird of the year, on a species of Mimosa of
the country, a plant very generally resorted to by the Trochilidce.