834:
33:
199:
436:
77:
52:
477:
ochraceous. Their iris is dark brown to hazel, their bill bright red or reddish brown (often with a dusky tip and base), and their legs and feet grayish olive to dull pea-green. Juveniles are less richly colored than adults, with less well defined and more ochraceous streaks, and a darker and much shorter bill.
823:
The red-billed scythebill's breeding seasons vary widely across its very large range. For instance, it nests between May and July in northern
Venezuela and September to November in southern Brazil. It nests in a cavity in a tree or stump which it lines with leaves and other plant matter. The clutch
875:
has assessed the red-billed scythebill as being of Least
Concern. It has a very large range and an estimated population of at least 500,000 mature individuals, though the population is believed to be decreasing. No immediate threats have been identified. It is considered uncommon to fairly common,
476:
are dusky. Their throat and chin are white, the latter with thin brownish streaks. Their underparts are a slightly lighter brown than the back; their breast has buff streaks that narrow on the belly but don't continue onto the undertail coverts. Their underwing coverts are light cinnamon to
862:
Like its breeding seasons, the red-billed scythebill's songs vary widely throughout its range. One in
Venezuela is "a rapid descending whinny...'we’he’he’he’he’he’he’e’e’e’e’e' ". In western Ecuador and Peru it is "a descending and gradually slowing series of fewer whistled notes,
467:
spots with narrow blackish edges; the spots narrow on the nape and become thin streaks on the upper back. Their rump is cinnamon-rufous that contrasts little with the back, their flight feathers are rufous-chestnut, and their tail is a slightly darker rufous-chestnut. Their wing
451:
The red-billed scythebill is 22 to 28 cm (8.7 to 11 in) long and weighs 30 to 55 g (1.1 to 1.9 oz). It is a slim, medium-sized woodcreeper with a very long, slim, dramatically decurved bill. The sexes have the same plumage. Adults of the
980:
Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 31 May 2023. A classification of the bird species of South
America. American Ornithological Society.
807:. It hitches up and along trunks and branches, mostly from the upper level of the understory to the subcanopy but also sometimes higher and lower. It typically takes its prey by probing crevices and holes in bark, bamboo, rotting wood, moss clumps,
432:) have also been suggested as sister species. Some of the subspecies are difficult to distinguish from each other. In addition, a small number of additional subspecies have been suggested to be split from existing ones.
777:
forest and riverside canebrakes. In elevation it mostly occurs below about 1,200 m (3,900 ft) but reaches 1,900 m (6,200 ft) in
Ecuador and 2,100 m (6,900 ft) in Venezuela.
863:'tuwee-tuwee-toowa-tew-tew' ". In northeastern Brazil the song is "a short series of fluted notes 'wuut wuut wit-wit-triffit' " that ascends at the end. The species also makes a variety of calls.
824:
size is one to three eggs though usually two; the incubation period and time to fledging are not known. Evidence suggests that both parents contribute to caring for the brood.
563:, longer bill than nominate, darker overall, buffier and more heavily streaked throat, blackish crown, body darker olive-brown, and rump, wings, and tail deeper rufous-chestnut
876:
though local, over most of its range. It is scarce in Panama and at upper elevations. "At least some populations believed to be highly sensitive to human disturbance."
1019:), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA.
1277:
1316:
1383:
803:, especially soft-bodied ones like spiders, and also includes small vertebrates. It usually forages singly, though sometimes in pairs, and often joins
1251:
1428:
1290:
1111:
1079:
1049:
1167:
1448:
1418:
463:. Their crown, nape, and back are reddish olive-brown, with the back being somewhat lighter. Their crown has longish whitish to
1398:
1433:
1295:
710:, southwestern Amazon Basin in northern Bolivia and possibly into immediately adjoining southeastern Peru and western Brazil
741:
The red-billed scythebill inhabits a wide variety of wooded landscapes, most of which are open to semi-open. These include
76:
296:
1408:
1202:
804:
32:
1443:
1403:
1321:
947:
1438:
1413:
731:
1423:
1393:
1388:
1329:
425:
409:
1334:
1189:
1129:
735:
1207:
198:
171:
920:
613:
1181:
671:, Amazon Basin of central Brazil on both sides and islands of the Amazon between the Rio Madeira and
636:
626:
640:
604:
453:
389:
369:
188:
41:
487:, larger and longer billed than nominate, bright tawny-ochraceous underparts, back brighter rufous
1360:
847:
721:
71:
480:
The other subspecies of the red-billed scythebill differ from the nominate and each other thus:
1282:
1342:
1308:
1225:
1107:
1075:
1045:
689:
600:
507:
but overall paler, less rufous upperparts and more rufous wings and tail, bill like nominate's
473:
138:
1347:
951:
915:
767:
762:
226:
222:
1194:
400:
148:
1015:
Marantz, C. A., A. Aleixo, L. R. Bevier, and M. A. Patten (2020). Red-billed
Scythebill (
897:
791:
The red-billed scythebill is believed to be a year-round resident throughout its range.
746:
672:
469:
421:
357:
338:
308:
284:
982:
435:
1377:
1303:
906:
319:
61:
56:
955:
833:
659:
649:
1230:
1217:
1264:
1161:
717:
663:
617:
460:
417:
229:
1152:
1355:
742:
698:
464:
808:
800:
528:
265:
233:
128:
88:
1146:
1020:
812:
773:
757:
685:
681:
257:
245:
108:
765:, and some scrublands. In the Amazon Basin it favors seasonally flooded
557:
with more decurved bill, browner crown, thinner black borders on streaks
1256:
1176:
751:
249:
237:
1269:
253:
241:
98:
1243:
1123:
658:, southwestern and western Brazil south of the Amazon River between
1238:
702:
434:
872:
424:, but genetic data indicate neither is true. The red-billed and
261:
218:
118:
1127:
1106:. Vol. II. Ithaca: Cornell University Press. p. 389.
1070:
McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010).
592:
The subspecies of the red-billed scythebill are found thus:
517:
but darker and with shorter bill, strong buff wash on throat
541:
but paler brown overall and with wider and whiter streaks
472:
have wide reddish olive-brown edges and the tips of the
1136:
983:
https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm
276:The red-billed scythebill has these 12 subspecies:
1044:. New York: Oxford University Press. p. 206.
921:10.2305/IUCN.UK.2020-3.RLTS.T22703185A138226913.en
603:into Colombia along the Pacific coast to northern
635:, coastal far northwestern Peru's departments of
459:have a thinly streaked face and neck with a weak
1102:Ridgely, Robert S.; Greenfield, Paul J. (2001).
827:
848:Listen to red-billed scythebill on xeno-canto
8:
799:The red-billed scythebill's diet is chiefly
680:, interior eastern and southern Brazil from
531:tinge, narrower crown streaks, whiter throat
1011:
616:into northern and central Venezuela to the
583:but larger with a longer, less curved, bill
1124:
1097:
1095:
1093:
1091:
1074:. Bogotá: Fundación ProAves. p. 127.
1065:
1063:
1061:
1035:
1033:
1031:
1029:
1009:
1007:
1005:
1003:
1001:
999:
997:
995:
993:
991:
197:
50:
31:
22:
942:
940:
938:
919:
612:, locally across northern Colombia from
885:
734:and northern Argentina as far south as
573:but slightly smaller with a longer bill
1021:https://doi.org/10.2173/bow.rebscy1.01
891:
889:
547:, bill like nominate's, blacker crown
7:
1072:Field Guide to the Birds of Colombia
1042:A Field Guide to the Birds of Brazil
1384:IUCN Red List least concern species
907:IUCN Red List of Threatened Species
652:of eastern Ecuador and eastern Peru
497:with a longer and more robust bill
14:
1104:The Birds of Ecuador: Field Guide
697:, coastal eastern Brazil between
832:
416:) have at times been considered
75:
1361:Campylorhamphus-trochilirostris
1168:Campylorhamphus trochilirostris
1138:Campylorhamphus trochilirostris
1017:Campylorhamphus trochilirostris
900:Campylorhamphus trochilirostris
896:BirdLife International (2020).
761:, forest clusters in savannah,
724:in Brazil, and western Paraguay
214:Campylorhamphus trochilirostris
181:Campylorhamphus trochilirostris
1429:Birds of the Amazon rainforest
408:The red-billed scythebill and
1:
527:but darker underparts with a
805:mixed-species feeding flocks
1465:
730:, southwestern Paraguay's
629:south into western Ecuador
625:, coastal from Colombia's
956:"Ovenbirds, woodcreepers"
914:: e.T22703185A138226913.
688:south to extreme western
196:
177:
170:
72:Scientific classification
70:
48:
39:
30:
25:
599:, from central Panama's
588:Distribution and habitat
272:Taxonomy and systematics
1449:Birds described in 1820
1419:Birds of the Gran Chaco
1040:van Perlo, Ber (2009).
954:, eds. (January 2023).
898:"Red-billed Scythebill
426:curve-billed scythebill
410:black-billed scythebill
163:C. trochilirostris
1399:Birds of South America
1023:retrieved July 5, 2023
985:retrieved May 31, 2023
443:
26:Red-billed scythebill
1434:Birds of the Caatinga
695:C. t. trochilirostris
457:C. t. trochilirostris
438:
365:C. t. trochilirostris
209:red-billed scythebill
960:IOC World Bird List
736:Entre Ríos Province
732:Ñeembucú Department
716:, eastern Bolivia,
714:C. t. lafresnayanus
610:C. t. venezuelensis
561:C. t. venezuelensis
485:C. t. lafresnayanus
454:nominate subspecies
385:C. t. lafresnayanus
292:C. t. venezuelensis
42:Conservation status
1409:Birds of Venezuela
950:; Donsker, David;
722:Mato Grosso do Sul
633:C. t. zarumillanus
614:Córdoba Department
577:C. t. zarumillanus
444:
316:C. t. zarumillanus
217:) is a species of
1444:Birds of Paraguay
1404:Birds of Colombia
1371:
1370:
1343:Open Tree of Life
1130:Taxon identifiers
1113:978-0-8014-8721-7
1081:978-0-9827615-0-2
1051:978-0-19-530155-7
952:Rasmussen, Pamela
854:
853:
669:C. t. snethlageae
627:Nariño Department
597:C. t. brevipennis
567:C. t. brevipennis
521:C. t. snethlageae
442:at Darien, Panama
440:C. t. brevipennis
404:
393:
381:
373:
370:Lichtenstein, MHC
361:
350:
346:C. t. snethlageae
342:
331:
323:
312:
300:
288:
281:C. t. brevipennis
232:. It is found in
221:in the subfamily
205:
204:
189:Lichtenstein, MHC
65:
1456:
1439:Birds of Bolivia
1414:Birds of Ecuador
1364:
1363:
1351:
1350:
1338:
1337:
1325:
1324:
1312:
1311:
1299:
1298:
1286:
1285:
1273:
1272:
1260:
1259:
1247:
1246:
1234:
1233:
1221:
1220:
1211:
1210:
1198:
1197:
1185:
1184:
1182:D5961A8ED9C376F5
1172:
1171:
1170:
1157:
1156:
1155:
1125:
1118:
1117:
1099:
1086:
1085:
1067:
1056:
1055:
1037:
1024:
1013:
986:
978:
972:
971:
969:
967:
944:
933:
932:
930:
928:
923:
893:
836:
828:
763:secondary forest
623:C. t. thoracicus
605:Chocó Department
545:C. t. thoracicus
399:
387:
380:Zimmer, JT, 1934
379:
367:
356:
349:Zimmer, JT, 1934
348:
337:
329:
318:
306:
304:C. t. thoracicus
294:
283:
225:of the ovenbird
223:Dendrocolaptinae
201:
183:
80:
79:
59:
54:
53:
35:
23:
1464:
1463:
1459:
1458:
1457:
1455:
1454:
1453:
1424:Birds of Brazil
1394:Birds of Panama
1389:Campylorhamphus
1374:
1373:
1372:
1367:
1359:
1354:
1346:
1341:
1333:
1328:
1320:
1315:
1307:
1302:
1294:
1289:
1281:
1276:
1268:
1263:
1255:
1250:
1242:
1237:
1229:
1224:
1216:
1214:
1206:
1201:
1193:
1188:
1180:
1175:
1166:
1165:
1160:
1151:
1150:
1145:
1132:
1122:
1121:
1114:
1101:
1100:
1089:
1082:
1069:
1068:
1059:
1052:
1039:
1038:
1027:
1014:
989:
979:
975:
965:
963:
946:
945:
936:
926:
924:
895:
894:
887:
882:
869:
860:
855:
850:
845:
844:
842:Songs and calls
821:
797:
789:
784:
728:C. t. hellmayri
656:C. t. notabilis
590:
535:C. t. notabilis
491:C. t. hellmayri
449:
430:C. procurvoides
397:C. t. hellmayri
335:C. t. notabilis
274:
192:
185:
179:
166:
150:Campylorhamphus
74:
66:
55:
51:
44:
17:
16:Species of bird
12:
11:
5:
1462:
1460:
1452:
1451:
1446:
1441:
1436:
1431:
1426:
1421:
1416:
1411:
1406:
1401:
1396:
1391:
1386:
1376:
1375:
1369:
1368:
1366:
1365:
1352:
1339:
1326:
1313:
1300:
1287:
1274:
1261:
1248:
1235:
1222:
1212:
1199:
1186:
1173:
1158:
1142:
1140:
1134:
1133:
1128:
1120:
1119:
1112:
1087:
1080:
1057:
1050:
1025:
987:
973:
934:
884:
883:
881:
878:
868:
865:
859:
856:
852:
851:
846:
840:
838:
826:
820:
817:
796:
793:
788:
785:
783:
780:
747:gallery forest
739:
738:
725:
711:
705:
692:
675:
666:
662:state and the
653:
646:C. t. napensis
643:
630:
620:
607:
601:Coclé Province
589:
586:
585:
584:
574:
564:
558:
551:C. t. napensis
548:
542:
532:
518:
508:
498:
493:, larger than
488:
448:
445:
422:sister species
414:C. falcularius
406:
405:
394:
382:
374:
362:
351:
343:
332:
327:C. t. napensis
324:
313:
301:
289:
273:
270:
203:
202:
194:
193:
186:
175:
174:
168:
167:
160:
158:
154:
153:
146:
142:
141:
136:
132:
131:
126:
122:
121:
116:
112:
111:
106:
102:
101:
96:
92:
91:
86:
82:
81:
68:
67:
49:
46:
45:
40:
37:
36:
28:
27:
15:
13:
10:
9:
6:
4:
3:
2:
1461:
1450:
1447:
1445:
1442:
1440:
1437:
1435:
1432:
1430:
1427:
1425:
1422:
1420:
1417:
1415:
1412:
1410:
1407:
1405:
1402:
1400:
1397:
1395:
1392:
1390:
1387:
1385:
1382:
1381:
1379:
1362:
1357:
1353:
1349:
1344:
1340:
1336:
1331:
1327:
1323:
1318:
1314:
1310:
1305:
1301:
1297:
1292:
1288:
1284:
1279:
1275:
1271:
1266:
1262:
1258:
1253:
1249:
1245:
1240:
1236:
1232:
1227:
1223:
1219:
1213:
1209:
1204:
1200:
1196:
1191:
1187:
1183:
1178:
1174:
1169:
1163:
1159:
1154:
1148:
1144:
1143:
1141:
1139:
1135:
1131:
1126:
1115:
1109:
1105:
1098:
1096:
1094:
1092:
1088:
1083:
1077:
1073:
1066:
1064:
1062:
1058:
1053:
1047:
1043:
1036:
1034:
1032:
1030:
1026:
1022:
1018:
1012:
1010:
1008:
1006:
1004:
1002:
1000:
998:
996:
994:
992:
988:
984:
977:
974:
961:
957:
953:
949:
943:
941:
939:
935:
922:
917:
913:
909:
908:
903:
901:
892:
890:
886:
879:
877:
874:
866:
864:
857:
849:
843:
839:
837:
835:
830:
829:
825:
818:
816:
814:
810:
806:
802:
794:
792:
786:
781:
779:
776:
775:
770:
769:
764:
760:
759:
754:
753:
748:
744:
737:
733:
729:
726:
723:
719:
715:
712:
709:
706:
704:
700:
696:
693:
691:
687:
683:
679:
676:
674:
670:
667:
665:
661:
657:
654:
651:
647:
644:
642:
638:
634:
631:
628:
624:
621:
619:
615:
611:
608:
606:
602:
598:
595:
594:
593:
587:
582:
581:venezuelensis
578:
575:
572:
571:venezuelensis
568:
565:
562:
559:
556:
553:, similar to
552:
549:
546:
543:
540:
537:, similar to
536:
533:
530:
526:
523:, similar to
522:
519:
516:
515:lafresnayanus
513:, similar to
512:
509:
506:
505:lafresnayanus
503:, similar to
502:
499:
496:
495:lafresnayanus
492:
489:
486:
483:
482:
481:
478:
475:
471:
466:
462:
458:
455:
446:
441:
437:
433:
431:
427:
423:
419:
415:
411:
402:
398:
395:
391:
386:
383:
378:
375:
371:
366:
363:
359:
355:
352:
347:
344:
340:
336:
333:
330:Chapman, 1925
328:
325:
321:
317:
314:
310:
305:
302:
298:
293:
290:
286:
282:
279:
278:
277:
271:
269:
267:
263:
259:
255:
251:
247:
243:
239:
235:
231:
228:
224:
220:
216:
215:
210:
200:
195:
190:
184:
182:
176:
173:
172:Binomial name
169:
165:
164:
159:
156:
155:
152:
151:
147:
144:
143:
140:
137:
134:
133:
130:
129:Passeriformes
127:
124:
123:
120:
117:
114:
113:
110:
107:
104:
103:
100:
97:
94:
93:
90:
87:
84:
83:
78:
73:
69:
63:
58:
57:Least Concern
47:
43:
38:
34:
29:
24:
21:
19:
1137:
1103:
1071:
1041:
1016:
976:
964:. Retrieved
959:
925:. Retrieved
911:
905:
899:
870:
861:
858:Vocalization
841:
831:
822:
798:
790:
772:
766:
756:
750:
740:
727:
713:
708:C. t. devius
707:
694:
677:
668:
655:
650:Amazon Basin
645:
632:
622:
609:
596:
591:
580:
576:
570:
566:
560:
554:
550:
544:
538:
534:
524:
520:
514:
511:C. t. devius
510:
504:
500:
494:
490:
484:
479:
456:
450:
439:
429:
420:and also as
413:
407:
396:
384:
377:C. t. devius
376:
364:
353:
345:
334:
326:
315:
303:
291:
280:
275:
213:
212:
208:
206:
180:
178:
162:
161:
149:
20:
18:
1330:Neotropical
1265:iNaturalist
1162:Wikispecies
948:Gill, Frank
718:Mato Grosso
678:C. t. major
673:Rio Tapajós
664:Rio Madeira
618:Rio Orinoco
539:snethlageae
501:C. t. major
461:supercilium
447:Description
418:conspecific
354:C. t. major
311:, PL, 1860)
230:Furnariidae
139:Furnariidae
1378:Categories
1356:Xeno-canto
880:References
809:bromeliads
801:arthropods
745:woodland,
743:Gran Chaco
699:Pernambuco
555:thoracicus
465:ochraceous
341:, JT, 1934
813:epiphytes
529:rufescent
474:primaries
390:d'Orbigny
320:Stolzmann
266:Venezuela
234:Argentina
157:Species:
95:Kingdom:
89:Eukaryota
1309:22703185
1283:10464782
1195:22703185
1190:BirdLife
1153:Q1078618
1147:Wikidata
966:27 April
962:. v 13.1
819:Breeding
787:Movement
782:Behavior
758:caatinga
401:Laubmann
258:Paraguay
246:Colombia
135:Family:
109:Chordata
105:Phylum:
99:Animalia
85:Domain:
62:IUCN 3.1
1335:rebscy1
1257:2485917
1244:rebscy1
1218:rebscy1
1177:Avibase
795:Feeding
752:cerrado
579:, like
569:, like
470:coverts
392:, 1846)
372:, 1820)
358:Ridgway
309:Sclater
299:, 1889)
297:Chapman
285:Griscom
250:Ecuador
238:Bolivia
191:, 1820)
145:Genus:
125:Order:
115:Class:
60: (
1348:231529
1322:190303
1296:559024
1208:102385
1110:
1078:
1048:
927:5 July
867:Status
811:, and
768:várzea
690:Paraná
648:, the
637:Tumbes
525:devius
403:, 1930
360:, 1911
339:Zimmer
322:, 1926
287:, 1932
264:, and
254:Panama
242:Brazil
227:family
1278:IRMNG
1270:11201
1239:eBird
1215:BOW:
774:igapó
703:Bahia
686:Ceará
682:Piauí
641:Piura
1317:NCBI
1304:IUCN
1291:ITIS
1252:GBIF
1231:QHRV
1203:BOLD
1108:ISBN
1076:ISBN
1046:ISBN
968:2023
929:2023
912:2020
873:IUCN
871:The
771:and
720:and
701:and
684:and
660:Acre
639:and
262:Peru
219:bird
207:The
119:Aves
1226:CoL
916:doi
268:.
1380::
1358::
1345::
1332::
1319::
1306::
1293::
1280::
1267::
1254::
1241::
1228::
1205::
1192::
1179::
1164::
1149::
1090:^
1060:^
1028:^
990:^
958:.
937:^
910:.
904:.
888:^
815:.
755:,
749:,
260:,
256:,
252:,
248:,
244:,
240:,
236:,
1116:.
1084:.
1054:.
970:.
931:.
918::
902:"
428:(
412:(
388:(
368:(
307:(
295:(
211:(
187:(
64:)
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