1886.) Scott oh the Birds, of Arizona. 2^7 



eight miles apart — Bendire's Thrasher is migratory, while many 

 Pahner's Thrashers are resident ; Strickland's Woodpecker is 

 migratory, and the Arizona Jay resident ; the two Warblers are 

 strictly migratory, and the Crossbill resident. It will be my 

 effort, therefore, to indicate, in as much detail as possible, the 

 distribution locally of at least the more characteristic species. 



The migrations here must be considered as occurring regularly 

 in two ways, primarily a north and south migration, and second- 

 arily, though of almost as much import as the other, a vertical 

 migration. There arcmany species that doubtless come under 

 both heads, but there are others that are as clearly to be classed in 

 the one or the other of these two categories. For examples of 

 each, reference may be made to the details regarding each species 

 which are to follow. 



The breeding period of most species, even in the same local- 

 it), is prolonged ; and though the number of young in a single 

 brood is limited in many species to two or three, it seems prob- 

 able that in such species the usual aggregate is reached through the 

 greater number of broods raised, which, in cases to be noted, is 

 at least four during a season. Breeding fairly begins by the mid- 

 dle of February, and of birds nesting then, I have found also 

 freshly laid eggs as late as the first of July. The season of breed- 

 ing in other species which begin to nest later lasts till late in 

 August. 



The collections I have made in this area aggregate a little over 

 foiu- thousand birds. At Florence and Riverside, and in the 

 vicinity of these places, in the spring of 1882, four hundred birds 

 were collected and notes made on tliat part of the territory. At 

 Mineral Creek, in October and November of the same vear, about 

 six hundred birds were added. On the San Pedro Slope of the 

 Santa .Catalinas, and incidentally in the valley of the San Pedro, 

 and in the pine forests of the Santa Catalinas, during the past two 

 years, somewhat more than three thousand birds have been obtain- 

 ed ; and most of the data in regard to migration, nesting period, 

 and the like have been acquired in this region. Though collec- 

 tions have been made in rather a desultory wav. at various times 

 and f )r short periods, about Tucson, and though constant travel 

 in the vicinity lias led to the record of many observations, yet I 

 am greatly indebted to Mr. Herbert Brown, of that place, for 

 many notes on species not met with by me, and for much \aln.i- 



