Ruby-crowned Kinglet Regulus calendula
STANFORD LOCATIONS: Fairly common migrant and winter resident in various habitats throughout campus.

Nest Location	Nest Type	Eggs Mating System	Dev. Parental Care	Primary & 2ndary Diet	Foraging Strategy
			MF I: 12? DAYS ALTRICIAL
15 feet - 30 feet (2 feet - 100 feet)	F?	7-9 (5-11) MONOG	F: 12? DAYS MF	TREE SAP BERRIES	HOVER & GLEAN HAWKS

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BREEDING:	Coniferous and coniferous-deciduous forests. ? broods.
DISPLAYS:	Male displays with red crest erect, singing a "wheezy, subdued song."
NEST:	Hung from limb, open at top with cavity deep enough to conceal incubating bird; of moss, lichen, down, twigs, dead leaves, lined with fine materials.
EGGS:	Creamy white to muddy cream, variably spotted with brown, usu wreathed. 0.5" (14 mm).
DIET:	Includes spiders; few seeds.
CONSERVATION:	Winters s to w Guatemala. Rare cowbird host.
NOTES:	Winter studies suggest that size of N.A. breeding populations may be limited by conditions experienced during the winter. Forms loose, mixed-species winter flocks with titmice, nuthatches, Brown Creepers, Golden-crowned Kinglets, and warblers.
ESSAYS:	Bird Guilds; Mixed-Species Flocking; Population Dynamics.
REFERENCES:	Laurenzi et al., 1982.

Help	Abbreviations	Species-Alphabetical	Species-Taxonomic	Essays-Alphabetical	Essays-Categorized
Except for Stanford Locations, the material in this species treatment is taken, with permission, from The Birder's Handbook (Paul Ehrlich, David Dobkin, & Darryl Wheye, Simon & Schuster, NY. 1988).