Carpenter, F. L. (1978) A spectrum of nectar-feeding communities. Amer. Zool. 18: 809–818.
Catchpole, C. K. (1973) Conditions of co-existence in sympatric populations of Acrocephalus warblers. J. Anim. Ecol. 42: 623–635.
Cody, M. L. (1978) Habitat selection and interspecific territoriality among the sylviid warblers of England and Sweden. Ecol. Monogr. 48: 351–396.
Coley, P. D. (1982) Rates of herbivory on different tropical trees. Pp. 123–132 in Leigh, E. G., Rand, A. S. and Windsor, D., eds. The ecology of a tropical forest. Washington, D.C.: Smithsonian Institution Press.
Cox, G. (1968) The role of competition in the evolution of migration. Evolution 22: 180–192.
Cruden, R. W. and Hermann–Parker, S. M. (1977) Defense of feeding sites by orioles and hepatic tanagers in Mexico. Auk 94: 594–596.
Dow, D. D. (1977) Indiscriminant interspecific aggression leading to almost sole occupancy of space by a single species of bird. Emu 77: 115–121.
Emlen, J. T. (1973) Territorial aggression in wintering warblers at Bahama agave blossoms. Wilson Bull. 86: 71–74.
Ewert, D. and Askins, R. (1991) Flocking behavior of migratory warblers in winter in the Virgin Islands. Condor 93: 864–869.
Fitzpatrick, J. (1980) Wintering of North American tyrant flycatchers. Pp.67–79 in Keast, A. and Morton, E. S., eds. Migrant birds in the Neotropics: ecology, behavior, and conservation. Washington, D.C.: Smithsonian Institution Press.
Foster, W. W. and Tate, J. (1966) The activities and coactions of animals at sapsucker trees. Living Bird 5: 87–113.
Gaze, P. D. and Clout, D. (1983) Honeydew and its importance to birds in beech forests of South Island, New Zealand. New Zealand J. Ecol. 6: 33–37.
Gill, F. B. and Wolf, L. L. (1979) Nectar loss by Golden-winged Sunbirds to competitors. Auk 96: 448–461.
Gradwohl, J. and Greenberg, R. (1980) The formation of antwren flocks on Barro Colorado Island. Auk 97: 385–396.
Greenberg, R. S. (1984) The winter exploitation systems of Bay-breasted and Chestnut-sided Warblers in Panama. Univ. Calif. Publ. Zool.: 1–107.
Greenberg, R. S. (1986) Competition in migrant birds in the non-breeding season. Curr. Orn. 3: 281–307.
Greenberg, R. S. (1992) Forest migrants in non-forest habitats on the Yucatan Peninsula. Pp.273–286 in Hagan, J. M. and Johnston, D. W., eds. Ecology and conservation of Neotropical migrant landbirds. Washington, D.C.: Smithsonian Institution Press.
Greenberg, R. S. and Salgado Ortiz, J. (in press) Interspecific territoriality in Yellow Warblers. Auk.
Greenberg, R. S., Macias Caballero, C. and Bichier, P. (1993) Defense of homopteran honeydew by birds in the Mexican highlands and other warm temperate forests. Oikos 68: 519–524.
Holmes, R. T., Sherry, T. and Reitsma, L. (1989) Population structure and territoriality and overwinter survivorship of two migrant warbler species in Jamaica. Condor 91: 545–561.
Hutto, R. (1985) Habitat selection by non-breeding migratory landbirds. Pp.455–476 in Cody, M. L., ed. Habitat selection in birds. New York: Academic Press.
Johnson, N. K. (1963) Biosystematics of sibling species of flycatchers in Empidonax hammondi-oberholseri-wrightii complex. Univ. Calif. Publ. Zool. 66: 79–238.
Kale, H. W. (1967) Aggressive behavior by a migrating Cape May Warbler. Auk 84: 120–121.
Lack, D. (1968) Partial migration and natural selection. Oikos 19: 1–9.
Lack, D. and Lack, P. (1972) Wintering warblers in Jamaica. Living Bird 11: 129–153.
Leck, C. (1972) Observation of birds at Cecropia trees in Puerto Rico. Wilson Bull. 84: 490–502.
Loyn, R. H., Runnals, R., Forward, G. and Tyers, J. (1983) Territorial Bell Miners and other birds affecting populations of insect prey. Science 221: 1411–1413.
Lynch, J. (1989) Distribution of overwintering Nearctic migrants in the Yucatan Peninsula. I: General pattern of occurrence. Condor 91: 515–545.
Lyon, D. L. (1976) A montane hummingbird territorial system in Oaxaca, Mexico. Wilson Bull. 88: 281–299.
Lyon, D. L., Crandall, J. and McKone, M. (1977) A test of the adaptiveness of interspecific territoriality in the Blue-throated Hummingbird. Auk 94: 448–454.
MacRoberts, M. H. (1970) Notes on the food habits and food defense of the Acorn Woodpecker. Condor 72: 196–204.
Maurer, B. (1984) Interference and exploitation in bird communities. Wilson Bull. 93: 478–490.
Moore, F. (1978) Interspecific aggression: towards whom should a mockingbird be aggressive? Behav. Ecol. Sociobiol. 3: 173–176.
Morse, D. H. (1966) The context of songs in the Yellow Warbler. Wilson Bull. 78: 444–455.
Morse, D. H. (1967) Foraging relationships of Brown-headed Nuthatches and Pine Warblers. Ecology 48: 94–106.
Morse, D. H. (1970) Ecological aspects of some mixed-species foraging flocks of birds. Ecol. Monogr. 40: 119–168.
Morse, D. H. (1990) American warblers. Cambridge, U.S.A.: Harvard University Press.
Munn, C. and Terborgh, J. (1979) Multi-specific territoriality in Neotropical foraging flocks. Condor 81: 338–347.
Murray, B. G. (1971) The ecological consequences of interspecific territorial behavior in birds. Ecology 52: 414–423.
Orians, G. H. and Willson, M. F. (1964) Interspecific territories of birds. Ecology 45: 736–745.
Paton, D. C. (1980) The importance of manna, honeydew and lerp in the diet of honeyeaters. Emu 80: 213–226.
Post, W. (1978) Social organization and foraging behavior of warblers wintering in Puerto Rican coastal scrub. Wilson Bull. 90: 197–214.
Powell, G. V. N. (1980) Migrant participation in Neotropical mixed species flocks. Pp.477–483 in Keast, A. and Morton, E. S., eds. Migrant birds in the Neotropics: ecology, behavior, distribution, and conservation. Washington, D.C.: Smithsonian Institution Press.
Rappole, J. and Morton, E. S. (1985) Effects of habitat alteration on a tropical forest community. Orn. Monogr. 36: 1013–1021.
Rappole, J. and Warner, D. (1980) Ecological aspects of migrant bird behavior in Veracruz, Mexico. Pp.353–393 in Keast, A. and Morton, E. S., eds. Migrant birds in the Neotropics: ecology, behavior, distribution, and conservation. Washington, D.C.: Smithsonian Institution Press.
Rice, J. (1978) Ecological relationships of two interspecifically territorial vireos. Ecology 59: 526–538.
Salomonsen, F. (1955) The evolutionary significance of bird migration. Biol. Medd. (Dansk) 22: 1–62.
Salomonson, M. G. and Balda, R. P. (1977) Winter territoriality of Townsend's Solitaires (Myadestes townsendi) in a Pinon-Juniper-Ponderosa Pine ecotone. Condor 79: 148–162.
Schemske, D. W. (1975) Territoriality in a nectar feeding Northern Oriole in Costa Rica. Auk 92: 594–595.
Sealy, S. G. (1989a) Defense of nectar sources by migrating Cape May Warblers. J. Field Orn. 60: 89–93.
Sealy, S. G. (1989b) Aggressiveness in migrating Cape May Warblers: defense of an aquatic food source. Condor 90: 271–274.
Sherry, T. W. and Holmes, R. T. (1988) Habitat selection by breeding American Redstarts in response to a dominant competitor, the Least Flycatcher. Auk 105: 350–364.
Staicer, C. A. (1992) Social behavior of the Northern Parula, Cape May Warbler, and Prairie Warbler wintering in second-growth forest in southwestern Puerto Rico. Pp. 380–320 in Hagan, J. M. and Johnston, D. W., eds. Ecology and conservation of Neotropical migrant landbirds. Washington, D.C.: Smithsonian Institution Press.
Terborgh, J. (1986) Keystone plant resources in the tropical forest. Pp.330–344 in Soulé, M. E. ed. Conservation biology. Sunderland, Mass.: Sinauer Associates.
Vidal-Rodríguez, R. M. (1992) Abundance and seasonal distribution of Neotropical migrants during autumn in a Mexican cloud forest. Pp. 370–376 in Hagan, J. M. and Johnston, D. W., eds. Ecology and conservation of Neotropical migrant landbirds. Washington, D.C.: Smithsonian Institution Press.
Willis, E. O. (1966) The role of migrant birds at swarms of army ants. Living Bird 5: 187–231.
Wunderle, J. (1978) Territorial defense of a nectar source by a Palm Warbler. Wilson Bull. 90: 297–299.