RUBY-CROWNED KINGLET
749. Regulus calendula. 4¼ inches
Male with a concealed patch of red on the crown; female with no red.
Like the last, these are chiefly winter visitants in the United States and they do not remain with us in the coldest weather, but pass on to the southern half of our country. They are nearly always met with in pine or other coniferous trees, being very abundant in spring in open pine woods and parks.
Song.—A clear warble, surprisingly loud and varied for so small a bird; call, a grating chatter.
Nest.—A ball of moss, grass and feathers, deeply cupped, like that of the last; partially suspended among the small twigs in the tops of coniferous trees; eggs white more sparingly marked than those of the last (.55 × .43).
Range.—N. A., breeding northward from the northern boundary of the U. S. and farther south in mountains; winters in the southern half of the U. S.
BLUE-GRAY GNATCATCHER
751. Polioptila cærulea. 4½ inches