Rocky -Mountain Hermit Thrush 521 



Alaska Hermit or Kadiak Dwarf Thrush. 

 Hylocichla guttata. 



A.O.U. Checklist no 759 — Colorado Records — Sprague 96, p. 85 

 {Turdus aonalaschkce) ; H. G. Smith 96, p. 76 ; Cooke 97, pp. 125, 170, 

 223 ; Henderson 03, p. 237 ; Warren 06, p. 24. 



Description. — Adult — Above plain greyish-brown, becoming cinnamon- 

 brown on the upper tail-coverts and tail ; a white orbital ring ; sides 

 of the face and ear-coverts greyish-brown, not buffy ; below white, 

 chest very slightly tinged with buffy, with conspicuous triangular 

 spots of dusky ; flanks slightly washed with pale greyish-brown ; iris 

 brown, bill black, pale horn at the base of the lower mandible, legs 

 light horn. Length 6 ; wing 3-50 ; tail 2-60 ; culmen -5 ; tarsus 1-05. 



The female is slightly smaller — wing 3-25. Young birds are streaked 

 and spotted with bui?y above, the chest is more strongly tinged with 

 buffy, and the lower-breast and flanks more or less barred with dusky. 



Distribution. — Breeding in the coast districts of Alaska, and migrating 

 south in winter to Lower CaUfornia, Chihuahua and western Texas. 



One of the migration routes of this Hermit-Thrush runs along the 

 foothills and neighbouring plains of eastern Colorado, where the bird 

 is quite common in the spring and autumn. It was first recognized as a 

 Colorado bird by Sprague, who obtained an example at Magnoha, in 

 Boulder co., 7,500 feet, October 6th, 1895. Other records are : 

 Baca CO., May 1st to 12th (Warren), El Paso and Lincoln cos., April 

 24th to May 24th (Aiken coll.), Denver, May 13th, September 26th 

 and October 5th (H. G. Smith), Fort Collins, October 1st (Cooke). 

 Frey found large numbers of these birds along the river bottom at 

 Salida on May 3rd, 1908, and for ten days or so afterwards. They 

 appeared after a very heavy storm. 



Rocky- Mountain Hermit-Thrush. 

 Hylocichla guttata auduhoni. 



A.O.U. Checklist no 759a — Colorado Records — Allen 72, pp. 147, 

 155, 161, 173 (T. pallasi) ; Trippe 74, p. 228 ; Henshaw 75, p. 144; 

 Scott 79, p. 91 ; Minot 80, p. 224 ; Tresz 81, p. 283 ; Drew 81, p. 86 ; 

 85, p. 15 ; Allen & Brewster 83, p. 152 ; Stone 84, p. 20 ; Beckham 

 87, p. 124 ; Morrison 88, p. 70 ; Thorne 88, p. 265 ; Kellogg 90, p. 89 ; 

 Lowe 92, p. 101 ; 94, p. 270 ; McGregor 97, p. 39 ; Cooke 97, pp. 19, 

 125, 223 ; Keyser 02, pp. 68, 235 ; Henderson 03, p. 237 ; 07, p. 31 ; 

 09, p. 242 ; Gihnan 07, p. 195 ; Rockwell 08, p. 179. 



Description. — Hardly to be distinguished from H. guttata, except 

 by its larger size ; upper-parts a trifle greyer and cinnamon of tail a 

 shade duller. Length 6-50 ; wing 3-87 ; tail 2-90 ; culmen -52 ; tarsus 1-12. 



