woodchuck, Maiiiiota iiionax (mammal), 113, 114-115, 



178, 187, 297-298, 300 

 woodpecker, Picidae (birds), 270, 299 

 woodpecker, acorn, Melanerpes foi'inicivorus, 311-312 

 woodpecker, black-backed three-toed, Picoides arcticus, 



301, 302-303 

 woodpecker, downy, Deiidrocopos pubescens, 296, Table 



8-6, Table 23-1, Table 7-4 

 woodpecker, Gila, Centurus uropygialis. 335-336 

 woodpecker, hairy, Dedrocopos villosus. Fig. 23-3, 296, 



302-303, Table 8-6, Table 23-1, Table 7-4 

 woodpecker, ivory-billed, Campephilus principalis. 298, 



300 

 woodpecker, ladder-backed, Deiidrocopos scalaris. 311- 



312, 335-336 

 woodpecker, Lewis', Asyndesmus lewis, 311-312 

 woodpecker, northern three-toed, Picoides tridactylus. 



Table 23-1 

 woodpecker, ^\it\.a\ls,Dendrocopos nuttalli. 311-312 

 woodpecker, pileated, Dryocopus pileatus, 296, Table 



8-8, Table 23-1 

 woodpecker, red-bellied, Centurus carohnus. Fig. 12-5, 



296 

 woodpecker, red-cockaded, Dendrocopos borealis. 298 

 woodpecker, red-headed, Melanerpes erythrocephahis, 



297-298 

 woodpecker, white-headed, He'i^/j'ofo/jos albolarvatus, 307 

 worm, stomach, Obeliscoides cimiculi, 241 

 worms (see Annelida) 



wren, Bewick's, Thryonianes beivickii (bird), 149, 312 

 wren, cactus, Campylorhynchus brunneicapillum, 335- 



336 



wren, Carolina, Thryothorus ludovicianus. 298, Table 8-6 

 wren, house, Troglodvtes aedon. Fig. 17-2, 149, 150, 211, 



214-215, 215, 221-222, 223, 235-236, 253, 297-298, 



Table 7-4 

 wren, long-billed marsh, Telmatodytes palustris, 368, 



Table 7-4 

 wren, rock, Salpinctes absoletus, 321-322 

 wren, short-billed marsh, Cistothoriis platensis. Table 



7-4 

 wren, winter, Troglodvtes troglodytes, 302-303, 303- 



305, 305, Table 23-1 

 wrentit, Chamaea fasciata (bird), 312 



yak. Bos grunniens (mammal), 323 



yeast, Thallophyta, 159-160, 166-167 



yellowlegs, lesser, Totaims flavipes (bird), 306, 321-322 



yellowthroat, Geothlxpis trichas (bird), 248, 297-298, 



Table 7-4, Table 8-6 

 yew, Taxus (shrub), 121 



zebra, Equidae (mammals), Fig. 27-4, 271, 344 

 zebra, Burchell's, Eqiius burchelli. Table 25-1 

 zooplankton, 66-69, 74, 75, 178, 183, 204, 206, 319, 351- 



359, 359-362, 365-366 

 zooxanthellae, alga-like flagellates, 366 



468 



Index 



