WOODPECKERS 211 



the trees are delicate birches they will probably be killed in time, 

 but the forest trees are too hardy to be affected by the loss of sap, 

 and as the sweet syrup attracts a host of insects, the sapsucker does 

 a good piece of work in destroying them. He ranks next to the 

 flicker as an ant-eater, one third of his solid food consisting of ants. 

 While watching his fly-trap he clings to the trunk as motionless as 

 if glued there. 



402a. Sphyrapicus varius nuchalis Baird. Red-naped Sap- 

 sucker. 



Adult male. — Upper parts black, thickly marked with white ; wing 

 coverts plain black, with wide white outer 

 stripe ; head with red crown and red nuchal 

 patch separated by a plain black area : sides of 

 head with white stripes ; chest black between red _^„^ 



throat and pale yellow belly. Adult female : ig. -n. 



similar, but duller, and black chest patch mostly mottled gray. Young : 

 duller, red of head and throat wholly wanting or only suggested by pale 

 claret-colored tinge. Length: 8.00-8.75, wing (male) 4.92-5.10. tail 3. 10- 

 ;J.40, bill .95-1.02. 



Remarks. — In the field the black chest patch easily distinguishes the 

 adult male nuchalis from ruber (40o). 



Distribution. — Transition and Canadian zones in the Rocky Mountain 

 region, from British Columbia to northwestera Mexico, and cape region 

 of Lower California, and from Colorado and Montana west to the eastern 

 slope of the Cascades and Sierra Nevada ; casual to western Kansas and 

 coast mountain region of California. 



Nest. — Generally in aspens, 5 to 30 feet from the ground. Eggs: 

 usually 4 or 5. white. 



Food. — Principally small beetles, spiders, grasshoppers, ants, and larvae 

 under the loose bark of trees ; also wild berries, and in fruit growing sec- 

 tions the sap of peach and apple trees, and willows. 



The members of the genus Sphyrapicus form a marked group. 

 They are sapsuckers, girdling the trees with small holes, from which 

 they get a perennial supply of sap with a host of attracted insects to 

 vary the diet. Their tongues are only slightly extensile, and have 

 brushy tips in sharp contrast to the long barbed tongues of the 

 Dryobates group, which spear their food from the depths of the 

 wood. 



In the nesting season, at least, the sapsuckcrs are extremely noisy, 

 active bird.s, striding up the tree trunks, calling loudly in tantalizing 

 tones, and cha.sing each other about in fine spirited fashion. 



The red-naped breeds along the borders of streams in the moun- 

 t:iiiis (»f tli(! interior, 



403. Sphyrapicus ruber (Gmel.). RED-ruKASTKn SAPsrcKFR. 



Adults. — Wluilf hrad. nerk, and rlnst 

 plain red, or black and white markings of 

 nuchalis only stiggosted ; back, wings, and 

 tail black, heavily marked with white ; belly Fig. 



