whitish; tail slightly forked. Female — Similar, but 

 center of crown bright yellow. 



Kinglets are tiny, dainty birds of the trees, 

 especially evergreen trees, where they often cling 

 back downward at the ends of the branches; their 

 call-notes are a fine lisping. The present and the 

 following species are usually to be determined only 

 by a close view; note the croivns. 



749. Ruby-crowned Kinglet — Regulus calen- 

 dula calendula. 



Length 4^ inches. (See cut, page 43). 



Male — Bright red partly concealed patch in cen- 

 ter of crown; upperparts grayish olive-green, 

 brighter on rump; two whitish wing-bars, under- 

 pays more or less tinged with buffy. Female — 

 Similar, but no red on crown. 



See above description of number 748. 



428. Ruby-throated Hummingbird — Archilochus 

 colubris. 



Exceedingly small. Length 3^4 inches. 



Male — Upperparts brilliant green; throat shin- 

 ing ruby-red. Female — No red on throat; more 

 whitish below; outer tail-feathers tipped with 

 white. 



Hovers before flowers and darts here and there; 

 wings make a humming or buzzing sound. This 

 is our only hummingbird. 



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