Many species collected in nearby parts of the channel area still remain unrecorded, and almost every year students report a bird or two previously unknown on the island. Those wishing to visit Barro Colorado Island should contact the Secretary of the Smithsonian Institution, Washington 25, D. In fact, most of the species recorded on the island were once seen or heard from there.
Best of all, its hillside location allows views of the lake, the sky, the grassy slope and the higher levels of the nearby forest. Many forest canopy birds are rarely noticed except when flying over the clearing or moving in the adjacent treetops. Based in part on studies of Barro Colorado, Ms. Sturgis wrote the “Field Book of Birds of the Panama Canal Zone,” which provides descriptions, with many illustrations, of most of the species known to occur in the Canal Zone.
5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 7columns of the Auk, Condor, Wilson Bulletin and Linnaean News- columns of the Auk, Condor, Wilson Bulletin and Linnaean News-. No one who has enjoyed the comforts of Barro Colorado can fail to acknowledge his gratitude to James Zetek, the resourceful and hospitable guardian of the island, but for whom there would be none.
THE ANNOTATED LIST
Hobson (including details of her companion Mrs C. A, Moore), Thomas Imhof, Dr. ing details of her companion Mrs C. A, Moore), Thomas Imhof, Dr. Both published and unpublished data, including that contained in the species index on Barro Colorado Island has been critical. Wetmore, who, as secretary of the Smithsonian Institution, has had the island under his sympathetic supervision; all three read the manuscript and gave it to me.
II7importance; in fact of the 306 species here listed all (except Phaeo importance; in fact of the 306 species here listed all (except Phaeo- progne tapera) have been collected within the contiguous parts of Panama, and nearly all within the Canal Zone. Technical Names.—The nomenclature followed is essentially that of the Panama checklist of Griscom (1935), with modifications suggested by the more recent studies of Hellmayr, Friedmann, Peters, Wetmore and Zimmer.in the canal zone.
Checklist of North American Birds The species names used here are those hitherto adopted by A. For ease of reference, where a chosen name differs significantly from that used in the Sturgis Field Book (1928), this name is indicated in parentheses.
NO, 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 9
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN II
12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 resident and one migrant, but field records are confused owing to the
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN I3
14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, 11/
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN I5
Adults: Over blackish; ear coverts and sides of neck and breast tawny reddish brown; a broad black mustache mark below the eye; rest of underside white, belly barred with black. Immature: Above browner, entire head and throat buff white, rest of underside white, with single black spots and black barringon sides. Adults: Black, with some white on the crown; white bars on thighs, under wing coverts, under tail coverts and tail.
Immature: Dark brown above, neck and crest white with black tips, wings barred and spotted with black and white; largely blackish underneath, with white in the center of the throat and breast and on the flanks, breast with brown stripes.
NO, 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 1
Notes: A series of clucking, cackling and guttural sounds, as well as a snap of the bill (Gross and Van. Tyne, 1929).
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN IQ
Ryan)
20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Larits pipixcan: Franklin's Gull
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 21
22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Order PSITTACIFORMES : Parrots
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 23
24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Order STRIGIFORMES : Owls
5 THE BIRDS OF BARRO COLORADO ISLAND — EISENMANN 25 common nighthawk (C. minor) also migrates across the Channel common nighthawk (C. minor) also migrates across the channel area, species could not be determined. A hoarse whistling cor-weeee-oo or por-weeeecer; also hup-hiip-hup or hip-hip-hip on one note. 15 Over the felling we often see the Chaetura shrike, but no specimen was caught.
As five species of Chaetura have been collected in or near the Channel Zone (Rogers, 1939) and their separation in the field is very difficult, identification by sight seems unreliable - at least until more is known.
26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 11/
One of the most common hummingbirds around the flower bushes of the glade, at least during June-September.
28 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7
5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 29 which sometimes ends with a few slower notes; an occasional bird, sometimes ending with a few slower notes; occasionally a bird will vary the usual call with a simple kuh, knh, kuh, kuh. Notes: A single loud and resonant but somewhat nasal cwa orcah, repeated with pauses of 2 to 3 seconds; occasionally around together like cah-cah-cah. Common in the forest; heard several times a day from the laboratory, especially early in the morning.
II7middle, rhythmic hoo-too-too or ho-hoo-hoo, accented on the soft, rhythmic hoo-too-too or ho-hoo-hoo, accented on the first syllable, often repeated and repeated by other individuals. Nonnulafrontalis frontalis: Grey-cheeked Nulle (Panama). Lamb); seen in woods, June 23, 1950, on Wheeler trail between Barbour-Lathrop and Snyder-Molino trails (Stott).
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 3I
32 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 33
Notes: A rapid whistling hoot, ending in a higher, more emphatic note hu-hu-hu-hu-hu-hu-hu-hu-hii-hu-weng, quite similar to the analogous call of the following species ; very loudgutturalgarrr orahrrr ;a catlike whine. Notes: A squeaky qiieek, queek; a somewhat sweeter tea soap, tea soap; a rapid, continuous series of chirps, syip-. 5 BIRDS FROM BARRO COLORADO ISLAND — EISENMANN 35syip-syip-syip; a series of high-pitched whistles going upwards, pu-peh-pey- siip-sip-sip-sip; a series of high-pitched whistles going upwards, pu-peh-pey- pih-piy-piee-pyee. Breeding: Nests with eggs, January 14, 1931, March.
Very common in the forest, frequenting the lower branches of smaller trees and the higher scrub, often in company with other birds. Common in the forest and forest edge; frequents thickets, stays low, but is not terrestrial.
36 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, II7
There is usually a few minutes' pause before the song repeats; by his imitation the bird can be deceived in appearance. A forest species with tree tops; perhaps not uncommon, but often seen; occasionally seen in tall trees at edge of clearing. In size (length, 7.8 inches) and color, it resembles the next species, being rufous above and reddish below; but differs in having the wing-coverts dark, spotted with a pale; yellow feathers on the sides of the breast (usually hidden) and very indistinct on the chest.
8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Tityra semifasciata c o stark ensis: Masked Tityra (Costa Rican)
Breeding: Builds nests in tree holes, roof corners, boxes and other natural or artificial holes and cavities. A few can generally be found in the laboratory clearing and others are well distributed along the lake shore. A pair of twos can often be found in the laboratory area; others are common along the lake shore and are also occasionally seen in the treetops of the forest.
Several pairs can usually be found in the clearing and birds are common along the lake.
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 4I
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 43
44 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7
5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 45Microtriccus brunneicapillus brunneicapillus: Brown-headed Tyrant- Microtriccus brunneicapillus brunneicapillus: Brown-headed Tyrant-. I noticed this frequently around the lab during my many visits in June, July and August.
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A few can usually be found around the lab and sometimes at one of the houses along the coast of the island. Song, variety of whistles usually mixed with cutta notes, per-cutta-whet, per-cutta whoot, per-cuttazvheet, per-cuttazvhoot; per-cutta-cuttle zvheet whoot; per-cuttawhoot whoot (Harrower). II7(T. migratorius), but it has a distinctive whining call, often inter- (T. migratorius), but it has a distinctive whining call, often repeated, sounds like chee-wee-va orkee-ee -wuh , sometimes.
Breeding: Eggs are dated in the Canal Zone and adjacent Panama area from February-August (Hallinan, Harrower, Eisenmann; . Stone, 1918). Previously unreported from the Canal Zone and known only in Panama from open woodland and scrub on the Pacific slope. Notes: Whistles a monotonous “one-two-three,” all on the same note, with untiring persistence” (Chapman).
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 49
Male: Turquoise blue above, including sides of head; black forehead, wings, tail and underparts; scarlet thighs.
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 5I
52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Seiurus aurocapillus: Ovenbird
NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 53
54 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Icterus galhnla: Baltimore Oriole
5 SIMBIROOTA ODOOLA BARRO COLORADO — EISENMANN 55Tangaralarvata franciscae: Tanager kan haguuggii warqee qabu (kan Aadde Wiilsan) Tangaralarvata franciscae: Tanager kan haguuggii warqee qabu (kan Aadde Wiilsan). Koonyaawwan muka burtukaanaa fi avokaadoo naannoo laaboraatoorii keessatti argaman, Fulbaana–Caamsaa 1937 (sketch); meeshaalee koonyaa walitti qabuu, July 13, 1947 (Aadde Hobson). Hubachiisa: Sirbi kun saffisaa, kan 'hissing', kan 'warbling' Tsu Tsu Tsewee Tsu Tsewee Tsu-tsewee, kan garaagarummaa qabudha.
In the Canal Zone, nests with eggs, April 13 and May 6 (Halinan); in Panama City, feeding young in nest, June 23 (Eisenmann). Notes: Song somewhat similar to that of the previous kind, but with a distinct 'r' sound: susurisiisuri, sree sree sree, susuri siisuri sihuri, with variations. Calls are goodbye with a rising or interrogative inflection, and goodbye with a falling inflection.
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NO. 5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 57
Harrower)
58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7
5 BIRDS OF BARRO COLORADO ISLAND — EISENMANN 59 Calls, zvhit-cho; also whistling zvhil or ivhite (as white in Calls, zvhit-cho; also whistling zvhil or ivhite (as white in bob-whitecall) ; also whup; alsocheeoo, cheeoo; alsochep-chep-chep. Habits of sparrows of Central America, with special emphasis on their breeding General and successional ecology of the lower tropical rainforest of Barro Colorado Island, Panama.
62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. II7 Wetmore, Alexander
