Rio grande jay 424 
Rissa 747 
brevirostris 748 
kotzebuii 748 
tridactyla 748 
River ducks 689 
Road runner 474 
Robin 244 
allied 244 
golden 408 
marsh 396 
oregon 245 
st. lucas 244 
Robin-sandpiper 632 
Robin-snipe 632 
Rock 
ptarmigan 587 
swift, white-throated 456 
swifts 456 
wrens 275 
Rocky mountain 
blue-bird 258 
garrot 704 
jay 425 
snow grouse 588 
Rodgers’ fulmar 778 
Rollulus 576 
Rook, vocal organs of 206 
Rose 
flycatching warblers 314 
tanager 318 
Roseate 
spoonbill 651 
tern 766 
Rose-breasted 
finch 348 
song grosbeak 389 
Ross’ 
goose 686 
rosy gull 753 
Rostrhamus 523 
plumbeus 523 
sociabilis 523 
Rostrum 100 ‘ 
of sphenoid 158 
of sternum 144 
Rosy finch 
allen’s 350 
baird’s 351 
brandt’s 351 
pallas’s 352 
tidgway’s 350 
swainson’s 351 
Rosy finches 350 
Rosy gull 
bonaparte’s 751 
franklin’s 751 
ross’ 753 
Rosy gulls 749 
Rough-winged swallow 324 
Royal tern 759 
Ruby-crowned kinglet 259 
Ruby-throated humming bird 461 
Rudder ducks 715 
Rudders 115 
Ruddy 
duck 715 
plover 633 
Ruff 640. 
Ruffed grouse 584, 585 
Ruffs of birds 97 
Rufous-bellied humming-bird 466 
Rufous-crowned summer finch 374 
Rufous-tailed 
crested flycatcher 435 
flycatchers 434 
INDEX. 
Rugz 103 
Rules of nomenclature 80 
Rump 94 
Runner, road 474 
Russet-backed thrush 247 
Rusty 
grackles 411 
song sparrow 372 
Rusty-crowned falcon 537 
Ruticilla 258 
SACRAL 
plexus 141 
vertebrae 140 
Sacro-iliac anchylosis 147 
Sacro-sciatic notch 148 
Sacrum 140, 141, 147 
Saddle-back 742 
Sage 
cock 580 
grouse 580 
hen 580 
Sage sparrow 
black-faced 376 
california 376 
nevada 376 
Sage sparrows 375 
Sage thrasher 249 
Sagmatorhina 
lathami 805 
suckleyi 806 
Saguaro woodpecker 488 
Saint domingo 
duck 715 
grebe 796 
Saint lucas 
cactus wren 275 
red-tail 545 
robin 244 
savanna sparrow 364 
thrasher 253 
woodpecker 482 
Salivary glands 210 
Salpinctes 275 
obsoletus 275 
Salt-water marsh-hen 672 
Samuels’ song sparrow 372 
Sanderling 633 
San diego savanna sparrow 3863 
Sandhill crane 667 
Sand-pigeons 562 
Sandpiper 
aleutian 629 
american green 639 
ash-colored 632 
baird’s 625 
bartramian 641 
black-bellied 631 
black-breasted 630 
buff-breasted 642 
cooper’s 627 
curlew 632 
ferrugineous 632 
reen 639 
east 625 
red-breasted 632 
pectoral 626 
purple 629 
prybilov 630 
robin 632 
semipalmated 624 
sharp-tailed 628 
spotted 640 
spoon-billed 634 
stilt 623 
855 
Sandpiper 
western semipalmated 625 
white-rumped 627 
Sandpipers 617 
curlew 631 
dunlin 631 
feather-leg 628 
fighting 640 
marble-wing 642 
pectoral 625 
purple 628 
semipalmated 625 
spotted 640 
spotty-throat 625 
Sandwich tern 761 
Sap-sucking woodpeckers 485 
Sarcorhamphus gryphus 557 
Sasia 126, 127 
Saurognathism 173 
Saurognathous skull 173 
Sauropsida 60 
Saurotherine 473 
Saurura 237, 821 
Savanna blackbird 472 
Savanna sparrow 
baird’s 360 
beaked 363 
common 363 
ipswich 361 
lark 363 
pipit 363 
san diego 363 
st. lucas 363 
Savanna sparrows 360 
Saw-bills 468, 716 
Saw-whet owl 513 
arctic american 512 
Saw-whet owls 512 
Saxicola 256 
cenanthe 256 
Saxicolina 242, 256 
Sayiornis 436 
fusca 437 
nigricans 437 
sayi 437 
Say’s pewit flycatcher 437 
Scala 
media 190 
tympani 188 
vestibuli 188 
Scale, nasal 105 
Scale of organization 77 
_ Scaled 
dove 570 
partridge 593 
Scansores 445 
Scansorial foot 130 
Scape 84 
Scaphoid tail 118 
Scapholunare 106, 107, 108 
Scapula 107, 146 
accessoria 108, 145 
Scapular arch 49, 145, 146 
Scapulare 94 
Scapulars 94 
Scardafella 570 
inca 570 
Scarlet 
ibis 651 
tanager 318 
Scaups 699 
Schizognathism 170 
Schizognathous skull 170 
Schizorhinal nasals 165 
Schizothecal podotheca 125 
Science defined 59 
