1919-] Cape San Antonio, Buenos Ayres. 509 



in 1899 I was told that it had not been seen for some time. 

 Indeed, personally, from 1881 (when I saw a pair at their 

 nearly-completed nest in the rincones) the species has only 

 twice come under my observation — a young bird in immature 

 plumage at the woods of the Yngleses head-station in 1882, 

 and an adult in the Real Viejo woods (on the southern 

 boundary oE the Yngleses) in 1904. 



Nevertheless, Mr. Claude Grant obtained a series of 

 specimens on his visit to the Yngleses in 1908-9, which 

 shows that the locality continues to be favonred by residents 

 or visitors. 



303. Falco peregrinus. Peregrine Falcon. 



Iris dark brown. Cere, eyelids, and nostrils yellow. Beak 

 greyish-blue, black at tip. Legs and feet bright yellow. 



My first record (and specimen) of this world-wandering 

 Falcon is dated 20 December, 1884, and by a very curious 

 coincidence there lies before me the last acquisition, one of 

 Claude Grant's collecting, bearing the date of 20 December, 

 1909 — an interval of exactly a quarter of a century. 



After the first-mentioned occurrence, I do not seem to 

 have observed another individual until 1898, a blank of no 

 less than fourteen years. The following year (1899), 

 a pair took u[) their abode during the summer in some 

 very lofty Eucalyptus trees in the Yngleses garden. On 

 both being secured for my collection, they were succeeded 

 by a single bird, which I refrained from molesting. In the 

 following years tiie same situation has been favoured 

 generally — but not invariably — by a pair. These were 

 always summer visitors, the earliest chronicled appearance 

 being 15 November and the latest noted 11 April, Other 

 occurrences are exceptionally rare — two or three individuals 

 seen in the open campo and probably identical with those 

 alluded to, and one between Ajo and Dolores. 



I have no hesitation in connecting our visitors with the 

 lofty Eucalyptus trees now existent, and which I have 

 already spoken of. It would seem as if the Peregrine found 

 the denser Tala woods did not furnish a satisfactory eyrie 



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