RIKER'S YELLOW-CROWNED TYRANNULET 



17. Tyrannulus elatus reguloides (Ridgway) 

 Riker's Yellow-crowned Tyrannulet 



Sexes alike. Length 97 mm. (3.85 in.); tail 

 40 mm. (1.60 in.). Top of head dusky passing 

 to slate on forehead and hindneck, with a 



FIG. 64. Tyrannulus elatus reguloides 



(Xat. Size) 



mostly concealed crown patch of bright yellow; 

 rest of upper parts pale olive green ; an indistinct 

 streak of pale gray over eye; cheeks and sides of 

 head pale gray fading into white or grayish white 

 tinged with yellow, on chin and throat; wings 

 dusky with two distinct bands of yellowish 

 white; tail dusky tipped with yellowish olive; 

 chest yellowish olive shading to pale yellow on 

 abdomen and under tail coverts. Bill very 

 small. 



This little bird is fairly common and widely 

 distributed in trees and shrubbery, being usually 

 seen in pairs. It has a characteristic soft 

 whistled call like the syllables dee, dea, with a 

 slight pause between the two parts. "Gorgona. 

 In thick shrubbery" (Hallinan); "Toro Point" 

 (Jewel) . 



299 



