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Birds of Central Patagonia, 
*Noctua cunicularia. 
Resident. A few seen in the valleys of the Sengel and 
Sengelen. 
— *ClRCUS CINEREUS. 
Resident^ but most numerous in the winter. On the 26th 
Oetober we found many pairs nesting on some low swampy 
land amongst long grass. The nest is a slight hollow in the 
ground, lined with a few pieees of grass ; and the complement 
of eggs two or three j the latter are of a dirty white colour. 
--^Buteo erythronotus. 
Resident. On the 15th October I took two eggs from a nest 
on the hills near the Chupat valley, and shot both old birds, 
the female from the nest. The male is of a rich slaty grey 
on the back, whilst the female has some rufous colouring 
about the back and shoulders. The young of the year, after 
their first moult, have the head above, shoulders, and back of 
a rich rufous colour, mottled with darker brown j the neck 
above has a broad transverse white band, the feathers tipped 
with black; sides of the head, chest, and stomach light 
fulvous, with darker markings; throat black, the base of the 
feathers white; tail of a rich slaty hue, with transverse bars 
of black. 
The adult has the upper mandible dark horn-colour, under 
one slate-colour; legs and feet pale orange ; iris dark orange. 
In the young of the year the beak and legs are slate-colour, 
iris light orange. 
The eggs are of a pale bluish white, slightly streaked 
and speckled with rufous markings, chiefly at the larger end, 
and measure 2*3 x 1*7 inches. 
I observed this species commonly on the hills throughout 
our journey. It feeds on mice and small rodents. 
*Geranoaetus melanoleucus. 
Resident, but not common, and never seen far from the 
sea. On the 30th December, at Tombo Point, I found a nest 
containing two young birds just about to fly. The nest was 
high up on a ledge in a deep rocky gully. The young birds 
in this stage have the head and shoulders dark umber-brown, 
