510 Birds of Colorado 
Genus REGULUS. 
Small birds—wing under 3-0—with a very slender, straight bill, 
shorter than the head ; nostrils slightly overhung but not concealed by 
small feathers ; wings rather long and pointed, exceeding the tail ; outer 
primary very short, always less than half the next ; tail slightly forked, 
the feathers pointed ; tarsus slender and booted, i.e. covered in front 
with one long scute ; plumage olive-green with a patch of red or yellow 
on the crown. 
About ten species from the northern parts of the Old and New 
Worlds. 
Key oF THE SPECIES. 
A. Crown with orange or yellow bordered by black. 
R. s. olivaceus, p. 510. 
B. Crown with a red spot but no black. RR. calendula, ¢ p. 511. 
C. Crown plain, like the back. R. calendula, ? p. 511. 
Western Golden-crowned Kinglet. 
Regulus satrapa olivaceus. 
A.O.U. Checklist no 748a—Colorado Records—Aiken 72, p. 195; 
Drew 81, pp. 87, 244 ; 85, p. 15; Allen & Brewster 83, p. 154 ; Morrison 
88, p. 71; Cooke 97, p. 123 ; Henderson 09, p. 241; Betts 10, p. 219. 
Description.—Male—Centre of the crown bright orange red, narrowly 
edged with yellow; around this w V-shaped patch of black, while 
a narrow frontal and superciliary band of white bounds the black; 
rest of the upper-parts olive, greyer anteriorly, greener posteriorly ; 
wings and tail dusky, edged with olive-yellow, and the middle and 
greater coverts tipped with whitish ; under-parts white, washed with 
dusky olive ; iris brown, bill black, legs dusky brown. Length 3-75; 
wing 2-20; tail 1-5; culmen -25; tarsus -70. 
The female is like the male, but has the orange part of the crown 
replaced by yellow ; young birds have the crown brownish-grey with 
the black V-mark rather indistinct. 
Distribution.— Western North America, breeding from Alaska to 
Mount Whitney in California, and to Colorado, wintering south to 
Guatemala. 
The Golden-crowned appears to be quite a rare resident in the 
mountains of Colorado, while it is perhaps a little more common as 
a migrant on the plains in spring; only very few observers have 
noted it. 
Aiken and Allen and Brewster record it from El Paso co., probably 
on migration, at the end of April and beginning of May. Drew obtained 
an adult male on July Ist, at 11,500 feet, and a young bird just fledged 
