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* This Thrush has, I believe, a partial migration in Buenos Ayres. In the autumn and winter 
I have frequently observed it in localities where it is never seen in summer." 
The accompanying observations are given by the late Mr. Henry Durnford in his paper on the 
Birds of Buenos Ayres (Ibis, 1877, p. 166):—“ Resident. Іп the winter to a great extent 
gregarious, and common always in the belt of trees and scrub which fringe the shore of the La Plata, 
preferring low land to a more elevated district. There is a fact about the note of this bird that I am 
anxious to record. Everyone in England is familiar with the subdued but querulous chuckle of the 
Blackbird, which it almost invariably utters before leaving the friendly shelter of a thick bush. Now, 
though Turdus leucomelas has scarcely any song, certainly nothing that can be compared with that of 
a Blackbird, it has exactly this same peculiar note, and utters it under precisely the same conditions 
as the Blackbird ; and so much did this coincidence strike me, that I thought when I first heard the 
sound that an escaped Blackbird was the author of it. I look upon this as one of the many isolated 
facts which seem to prove descent from a common progenitor. Common at Baradero in April." 
Mr. Barrows (Bull. Nutt. Orn. Club, viii. р. 85, 1883) writes from Uruguay :— This bird 
abounds at Concepcion all the year round, and was taken also at Buenos Aires. It was not 
observed either at Azul or any of the points further south. It is found in the gardens of the town, 
as well as in the depths of the swampy woods, but never seen far from leafy cover of some kind, and 
does not appear at home on the ground. ЈЕ is very unsuspicious, and is frequently caged and 
becomes reconciled to its imprisonment, yet is not very musical. The nest is usually well hidden 
among the tops of bushes or masses of twining plants, never more than ten feet from the ground, 
and resembles in general the nest of our own Robin (T. migratorius), but is smaller and contains no 
mud in its composition, so far as my observation goes. Тһе eggs, commonly four, are splashed and 
dotted with several shades of brown on a dirty green ground. Sets were taken through October and 
November, and frequently the eggs of the Cowbird were found with them." 
Mr. O. V. Aplin, in his paper on the Birds of Uruguay (Ibis, 1894, p. 161), observes :—“I saw 
one in the quinta at Santa Elena on the 22nd of October, just after my arrival, and before my 
luggage, with my cartridges, had come up country, but did not meet with the adult again in that 
neighbourhood ; however, on the 22nd of February, I shot a Thrush in nestling dress in thin monte 
on the coast of the Monzon, which Mr. Sclater believes to be of this species. In the monte of the 
Rio Negro I found the Dusky Thrush rather common, but excessively shy and retiring, and very 
difficult to see—betraying its presence usually only by its low, sweet alarm-note, like that of our 
Song-Thrush when disturbed among the fruit-trees. They were not at that time (mid-December) 
in song." 
Mr. E. W. White states that he found the species in the woods around the old Jesuit ruins in 
Misiones. Не says that it has a pleasant whistle and is often kept as a cage-bird. 
Adult. General colour above dark olive-brown, with a slight wash of olive, especially towards 
the rump and upper tail-coverts, the latter being dull sepia-brown like the tail, washed with dull 
slaty-grey ; wing-coverts like the back; bastard-wing, primary-coverts, and quills sepia-brown, 
externally washed with ashy-olive; crown of the head and sides of face like the back, blackish in 
front of the eye; the cheeks scarcely at all streaked with white ; throat white, distinctly streaked 
with rows of black triangular spots; the lower throat not spotted, so that there is a small patch of 
plain white; fore-neck, breast, and sides of body dark ashy-brown, as also the thighs; abdomen and 
under tail-coverts whitish, the latter with broad lateral edges of dark brown; axillaries and under 
wing-coverts very pale buff, with only a faint tinge of orange, which also pervades the inner aspect 
of the quills, which are dusky brown below: bill yellow; “iris brown” (Burmeister). Total length 
8:5 inches, culmen 0:9, wing 47, tail 3:6, tarsus 1:8. 
The yellow bill is a sign of an old bird in nesting-plumage. Тһе pale orange tint on the 
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