- Allmendinger, R. W., Jordan, T. E., Kay, S. M. & Isacks, B. L. (1997): The evolution of the Altiplano-Puna plateau of the Central Andes. Rev. Earth Planet. Sci. 25: 139–174.
Article CAS Google Scholar
- Amadon, D. (1966): The superspecies concept. Syst. Zool. 15: 245–249.
Article Google Scholar
- Amadon, D. & Short, L. L. (1992): Taxonomy of lower categories — suggested guidelines. Bull. Brit. Orn. Cl., Centenary Suppl. 112A: 11–38.
Google Scholar
- Andriessen, P. A. M., Helmens, K. F., Hooghiemstra, H., Riezebos, P. A. & van der Hammen, T. (1993): Absolute chronology of the Pliocene-Quaternary sediment sequence of the Bogotá area, Colombia. Quat. Sc. Rev. 12: 483–501.
Article Google Scholar
- Avise, J. C. & Walker, D. (1998): Pleistocene phylogeographic effects on avian populations and the speciation process. Proc. R. Soc. Lond. B. 265: 457–463.
Article CAS Google Scholar
- Bangs, O. (1899): On some new or rare birds from the Sierra Nevada de Santa Marta, Colombia. Proc. Biol. Soc. Washington 13: 91–108.
Google Scholar
- Berlepsch, H. von (1897): Bericht über die Jahresversammlung. J. Ornithol. 45: 76–93.
Article Google Scholar
- Bleiweiss, R. (1985): Variation and population structure of the Tourmaline Sunangel,Heliangelus exortis exortis (Aves, Trochilidae). Amer. Mus. Novit. 2811: 1–14.
Google Scholar
- Bleiweiss, R. (1988): Systematics and geographic variation in the Golden-breasted Puffleg,Eriocnemis mosquera (Aves, Trochilidae). Amer. Mus. Novit. 2913: 1–8.
Google Scholar
- Boucard, A. (1893): Descriptions of several supposed new species of humming-birds. Humming Bird 3: 6–10.
Google Scholar
- Bourcier, M. J. (1853): Nouvelle espèce du genre_Metallura_, Gould. Rev. et Mag. Zool. 5(2): 295–296.
Google Scholar
- Cabanis, J. & Heine, F. (1860): Die Schrillvögel, Halberstadt.
- Cabanis, J. (1874): Protokoll der VI. Jahresversammlung. J. Ornithol. 22: 92–100.
Article Google Scholar
- Chapman, F. M. (1917): The distribution of bird-life in Colombia: a contribution to a biological survey of South America. Bull. Amer. Mus. Nat. Hist. 36: 1–729.
Google Scholar
- Colinvaux, P. A., Olson, K. & Kam-Biu, L. (1988): Late-glacial and Holocene pollen diagrams from two endorheic lakes of the inter-Andean plateau of Ecuador. Rev. Palaeobot. Palynol. 55: 83–99.
Article Google Scholar
- Collar, N. J., Gonzaga, L.P., Krabbe, N., Madroño Nieto, A., Naranjo, L. G., Parker III, T.A. & Wege, D.C. (1992): Threatened birds of the America. The ICBP/IUCN Red data book. Washington, London.
- Cracraft, J. & Prum, R. O. (1988): Patterns and processes of diversification: speciation and historical congruence in some Neotropical birds. Evolution 42: 603–620.
Article PubMed Google Scholar
- DeLattre, A. & Bourcier, J. (1846): Description de quinze espèces nouvelles de Trochilidées. Rev. Zool.: 305–312.
- DeLattre, A. & Lesson R. P. (1839): Oiseaux-mouches où trés rares. Rev. Zool: 13–21.
- Dunning, J. B. (1993): CRC handbook of avian body masses. Boca Raton.
- Fjeldså, J. (1981): Comparative ecology of Peruvian grebes — a study of the mechanisms of evolution of ecological isolation. Vidensk. Meddr. Dansk. Naturh. Foren. 143: 125–249.
Google Scholar
- Fjeldså, J. (1991): Biogeographic patterns in birds of high Andean relict woodlands. Acta XX Congressus Internationalis Ornithologici Christchurch (1990): 342–353.
- Fjeldså, J. (1992): Un analisis biogeografico de la avifauna de los bosques de Queñoa (Polylepis) de los Andes y su relevancia para establecer prioridades de conservación. Memorias Museo Hist. Natural, U.N.M.S.M. (Lima) 21: 207–221.
Google Scholar
- Fjeldså, J. (1995): Geographical patterns of neoendemic and older relict species of Andean forest birds: The significance of ecologically stable areas. Biodiversity and conservation of Neotropical montane forests. New York.
- Fjeldså, J. & Krabbe, N. (1990): Birds of the High Andes. Zoological Museum, Univ. of Copenhagen. Copenhagen.
Google Scholar
- Franke, I. (1991): Disjunct bird distribution along the west slope of the Peruvian Andes. Acta XX Congressus Internationalis Ornithologici Christchurch (1990): 317–326.
- Frey, J. K. (1993): Modes of peripheral isolate formation and speciation. Syst. Biol. 42: 373–381.
Article Google Scholar
- Futuyma, D. J. (1986): Evolutionary biology. Sinauer Associates Inc., Sunderland, Mass.
Google Scholar
- Garcia-Moreno, J., Arctander, P. & Fjeldså, J. (In press): Speciation at the tree-line in the Andes: A case study with_Metallura_ hummingbirds. Auk.
- Gould, J. (1846): On twenty new species of Trochilidae or humming birds. Proc. Zool. Soc. London, pt. 14: 85–90.
Article Google Scholar
- Gould, J. (1847): Drafts for a new arrangement of the Trochilidae. Proc. Zool. Soc. London, pt. 15: 94–96.
Google Scholar
- Gould, J. (1861): An introduction to the Trochilidae or family of Humming-birds. London.
- Graves, G. R. (1980): A new species of Metaltail hummingbird from Northern Peru. Wilson Bull. 92: 1–7.
Google Scholar
- Graves, G. R. (1981): A new subspecies of Coppery Metaltail (Metallura theresiae) from Northern Peru. Auk 98: 382.
Google Scholar
- Graves, G. R. (1982): Speciation in the Carbonated Flower-Piercer (Diglossa carbonaria) complex of the Andes. Condor 84: 1–14.
Article Google Scholar
- Graves, G. R. (1985): Elevational correlates of speciation and intraspecific geographic variation in plumage in Andean forest birds. Auk 102: 556–575.
Article Google Scholar
- Haffer, J. (1970): Entstehung und Ausbreitung nordandiner Bergvögel. Zool. Jahrb. Syst. 97: 301–337.
Google Scholar
- Haffer, J. (1974): Avian speciation in tropical South America. Publ. Nuttall Orn. Cl. 14, Cambridge, Mass.
Google Scholar
- Haffer, J. (1979): Quaternary biogeography of tropical lowland South America. In: Duellman, W. E. (ed.): The South American herpetofauna: its origin, evolution, and dispersal: 107–140. Monogr. 7. Mus. Nat. Hist., Univ. of Kansas, Lawrence.
Google Scholar
- Haffer, J. (1987): Biogeography of Neotropical birds. In: Prance, G. T. (eds.): Quaternary history of tropical America. 105–150. Oxford.
- Hammen, T. van der & Cleef, A. M. (1986): Development of the high Andean páramo flora and vegetation. High altitude tropical biogeography. New York.
- Hammen, T. van der & Gonzalez, E. (1964): A pollen diagram from the Quaternary of the Sabana de Bogotá (Colombia) and its significance for the geology of the Northern Andes. Geologie en Mijnbouw 43: 113–117.
Google Scholar
- Hammen, T. van der (1961): Late Cretaceous and Tertiary stratigraphy and tectogenesis of the Colombian Andes. Geologie en Mijnbouw 40: 181–188.
Google Scholar
- Hartert, E. (1899): Further notes on humming birds. Nov. Zool. 6: 72–75.
Google Scholar
- Hastenrath, S. (1981): The glaciation of the Ecuadorian Andes. Rotterdam.
- Hennig, W. (1950): Grundzüge einer Theorie der phylogenetischen Systematik. Berlin.
- Hooghiemstra, H. & Ran, E. T. H. (1994): Late Pliocene-Pleistocene high resolution pollen sequence of Colombia: An overview of climatic change. Quaternary International 21: 63–80.
Article Google Scholar
- Hooghiemstra, H., Melice, J. L., Berger, J. L. & Shackleton, N. J. (1993): Frequency spectra and paleoclimatic variability of the high-resolution 30–1450 kyr Funza I pollen record (Eastern Cordillera, Colombia). Quat. Sc. Rev. 12: 141–156.
Article Google Scholar
- James, F.C. (1970): Geographic size variation in birds and its relationship to climate. Ecology 51: 365–390.
Article Google Scholar
- King, J. R. (1989): Notes on the birds of the Río Mazan Valley, Azuay Province, Ecuador, with special reference to_Leptosittaca branickii, Hapalopsittaca amazonina pyrrhops_ and_Metallura baroni_. Bull. Brit. Orn. Club 109: 140–147.
Google Scholar
- Klicka, J. & Zink, R. M. (1997): The importance of recent Ice Ages in speciation: A failed paradigm. Science 277: 1666–1669.
Article CAS Google Scholar
- Mayr, E. (1942): Systematics and the origin of species. New York.
- Mayr, E. (1963): Animal species and evolution. Cambridge, Mass.
- Mayr, E. & Ashlock, P. D. (1991): Principles of systematic zoology. 2nd. ed. New York.
- Mayr, E. & Short, L. L. (1970): Species taxa of North American birds. Publ. Nuttall Orn. Club, No. 9. Cambridge, Mass.
Google Scholar
- Moore, R. T. (1940): The nomenclature and habits of the Black-throated Copper-tailed Hummingbird. Condor 42: 251–254.
Article Google Scholar
- Orbigny, A. de (1838): No title. Synopsis avium in Mag. Zool. cl. 2: 1–33.
Google Scholar
- Ortiz-Crespo, F. I. (1972): A new method to separate immature and adult hummingbirds. Auk 89: 851–857.
Article Google Scholar
- Parker, T. A., Schulenberg, T. S., Graves, G. R. & Braun, M. J. (1985): The avifauna of the Huancabamba region, Northern Peru. Neotropical ornithology. Orn. Monogr. 36: 169–197.
Article Google Scholar
- Patton, J. L., Myers, P. & Smith, M. F. (1990): Vicariant versus gradient models of diversification: The small mammal fauna of eastern Andean slopes of Peru. Vertebrates in the tropics. Proc. Intern. Symposium on vertebrate biogeography and systematics in the tropics: 355–380. Bonn.
- Paynter, R. A., jr. (1982): Ornithological gazetteer of Venezuela. Cambridge, Mass.
- Paynter, R. A., jr. (1992): Ornithological gazetteer of Bolivia. 2nd ed. Cambridge, Mass.
- Paynter, R. A., jr. & Traylor, M. A., jr. (1977): Ornithological gazetteer of Ecuador. Cambridge, Mass.
- Paynter, R. A., jr. & Traylor, M. A., jr. (1981): Ornithological gazetteer of Colombia. Cambridge, Mass.
- Paynter, R. A., jr. & Traylor, M. A., jr. (1992): Ornithological gazetteer of Ecuador. 2nd ed. Cambridge, Mass.
- Peters, J. L. (1945): Check-list of birds of the world. Vol. 5. Cambridge, Mass.
- Prance, G. T. (1982): Biological diversification in the tropics. New York.
- Remsen, J. V., jr. (1984a): Geographic variation, zoogeography, and possible rapid evolution in some_Cranioleuca_ spinetails (Furnariidae) of the Andes. Wilson Bull. 96: 515–523.
Google Scholar
- Remsen, J. V., jr. (1984b): High incidence of “leapfrog” pattern of geographic variation in Andean birds: implication for the speciation process. Science 224: 171–173.
Article PubMed Google Scholar
- Rensch, B. (1929): Das Prinzip der geographischen Rassenkreise und das Problem der Artbildung. Berlin.
- Salvin, O. (1893): No title. Bull. Brit. Orn. Club. 1: 45–51.
Google Scholar
- Schubert, C. (1974): Late Pleistocene Mérida glaciation, Venezuelan Andes. Boreas 3: 147–151.
Article Google Scholar
- Schuchmann, K.-L. & Heindl, M. (1997): Biogeographie, geographische Variation und Taxonomie der andinen Kolibrigattung_Chalcostigma_ Reichenbach, 1854. Mitt. Zool. Mus. Berl. 73, Suppl.: Ann. Orn. 21: 131–153.
Google Scholar
- Simon, E. (1902): Etude sur les Trochilidées observés au Pérou par G. A. Baer (1900–1901). Nov. Zool. 9: 177–183.
Google Scholar
- Simpson-Vuilleumier, B. (1971): Pleistocene changes in the fauna and flora of South America. Science 173: 771–780.
Article Google Scholar
- Simpson, B. (1979): Quaternary biogeography of the high montane regions of South America. The South American herpetofauna: its origin, evolution, and dispersal. Monogr. 7, Mus. Nat. Hist., Univ. of Kansas, Lawrence.
Google Scholar
- Smithe, F. B. (1975): Naturalist's color guide. New York.
- Stephens, L. & Traylor, M. A., jr. (1983): Ornithological gazetteer of Peru. Cambridge, Mass.
- Todd, W. E. C. & Carriker, M. A., jr. (1922): The birds of the Santa Marta region of Colombia: a study in altitudinal distribution. Ann. Carnegie Mus. 14: 1–611.
Google Scholar
- Todd, W. E. C. (1913): Preliminary diagnosis of apparently new birds from tropical America. Proc. Biol. Soc. Washington 26: 169–174.
Google Scholar
- Vareschi, V. (1980): Vegetationsökologie der Tropen. Stuttgart.
- Vigors, N. A. (1832): Characters of several new species of birds. Proc. Comm. Zool. Soc., London, pt. 2: 1–9.
Article Google Scholar
- Vuilleumier, F. (1969a): Pleistocene speciation in birds living in the High Andes. Science 223: 1179–1180.
Google Scholar
- Vuilleumier, F. (1969b): Systematics and evolution in_Diglossa_ (Aves, Coerebidae). Amer. Mus. Novit. No. 2381: 1–44.
- Vuilleumier, F. (1977): Barrières écogéographiques permettant la spéciation des oiseaux des hautes Andes. Biogéographie et évolution en Amérique tropicale. Publ. Labor. Zool. No. 9, Ecole Normale Supérieure, Paris.
- Vuilleumier, F. (1984a): Patchy distribution and systematics of_Oreomanes fraseri_ (Aves:? Coerebidae) of Andean_Polylepis_ woodlands. Amer. Mus. Novit. No. 2777: 1–17.
- Vuilleumier, F. (1984b): Zoogeography of Andean birds: Two major barriers, and speciation and taxonomy of the_Diglossa carbonaria_ superspecies. Nat. Geogr. Soc. Res. Reports 16: 713–731.
Google Scholar
- Vuilleumier, F. (1986): Origins of the tropical avifauna of the High Andes. High altitude tropical biogeography. New York.
- Vuilleumier, F. (1993a): Biogeografía de aves en el neotrópico: jerarquías conceptuales y perspectivas para futuras investigaciones. Rev. Chilena Hist. Nat. 66: 11–51.
Google Scholar
- Vuilleumier, F. (1993b): Field study of allopatry, sympatry, parapatry, and reproductive isolation in steppe birds of Patagonia. Orn. Neotrop. 4: 1–41.
Google Scholar
- Vuilleumier, F. (1994): Biogeografía de las aves altoandinas: ensayo sobre algunos aspectos de su evolucion. Ans. Inst. Pat. Ser. Cs. Nts., Punta Arenas (Chile) 21: 39–66.
Google Scholar
- Vuilleumier, F. & Ewert, D. N. (1978): The distribution of birds in Venezuelan páramos. Bull. Am. Mus. Nat. Hist. 162: 47–90.
Google Scholar
- Vuilleumier, F. & Simberloff, D. (1980): Ecology versus history as determinants of patchy and insular distributions in high Andean birds. Evol. Biol. 12: 235–379.
Article Google Scholar
- Vuilleumier, F. & Mayr, E. (1987): New species of birds described from 1976–1980. J. Ornithol. 128: 137–150.
Article Google Scholar
- West-Eberhard, M. J. (1983): Sexual selection, social competition, and speciation. Quart. Rev. Biol. 58: 155–183.
Article Google Scholar
- Wetmore, A. (1970): Descriptions of additional forms of birds from Panama and Colombia. Proc. Biol. Soc. Washington 82: 767–776.
Google Scholar
- Zimmer, J. T. (1952): Studies of Peruvian birds, No. 62. The genera_Patagona, Sappho, Polyonymus, Ramphomicron, Metallura, Chalcostigma, Taphrolesbia_, and_Aglaiocercus_. Amer. Mus. Novit. No. 1595.