Floral resource availability and hummingbird territorial behaviour on a Neotropical savanna shrub

Altshuler DL, Stiles FG, Dudley R (2004) Of hummingbirds and helicopters: hovering costs, competitive ability, and foraging strategies. Am Nat 163:16–25

Brody AK, Mitchell RJ (1997) Effects of experimental manipulation of inflorescence size on pollination and pre-dispersal seed predation in the hummingbird-pollinated plant Ipomopsis aggregata. Oecologia 110:86–93

Cotton PA (1998) Temporal partitioning of a floral resource by territorial hummingbirds. Ibis 140:647–653

Ewald PW, Carpenter FL (1978) Territorial responses to energy manipulations in the anna hummingbird. Oecologia 31:277–292

Feinsinger P (1978) Ecological interactions between plants and hummingbirds in a succecional tropical community. Ecol Monogr 48:269–287

Feinsinger P, Colwell RK (1978) Community organization among Neotropical nectar-feeding birds. Am Zool 18:779–795

Feinsinger P, Colwell RK, Terborgh J, Chaplin SB (1979) Elevation and the morphology, flight energetics, and foraging ecology of tropical hummingbirds. Am Nat 113:481–497

Ferreira ARJ, Smulders TV, Sameshima K, Mello CV, Jarvis ED (2006) Vocalizations and associated behaviors of the somber hummingbird (Aphantochroa cirrhochloris) and the rufous-breasted hermit (Glaucis hirsutus). Auk 123:1129–1148

Franceschinelli EV, Bawa KS (2000) The effect of ecological factors on the mating system of a South American shrub species (Helicteres brevispira). Heredity 84:116–123

Gottsberger G, Silberbauer-Gottsberger I (2006) Life in the Cerrado: a South American tropical seasonal ecosystem. Reta, Ulm

Grantsau R (1989) Os beija-flores do Brasil. Expressão e Cultura, Rio de Janeiro

Henderson J, Hurly TA, Bateson M, Healy SD (2006) Timing in free-living rufous hummingbirds, Selasphorus rufus. Curr Biol 16:512–515

Kodric-Brown A, Brown JH (1978) Influence of economics, interspecific competition, and sexual dimorphism on territoriality of migrant rufous hummingbirds. Ecology 59:285–296

Machado AO, Silva AP, Consolaro HN, Barros MG, Oliveira PE (2010) Breeding biology and distyly in Palicourea rigida H. B. & K. (Rubiaceae) in the Cerrados of Central Brazil. Acta Bot Bras 24(3):686–696. doi: 10.1590/S0102-33062010000300012

Marchesseault L, Ewald PW (1991) Effect of territory quality on intrusion rate in nonbreeding hummingbirds. Behav Ecol Sociobiol 28:305–308

Ornelas JF, González C, Uribe J (2002) Complex vocalizations and aerial displays of the amethyst-throated hummingbird (Lampornis amethystinus). Auk 119:1141–1149

Ribeiro JF, Walter BMT (1998) Fitofisionomias do Bioma Cerrado. In: Sano SM, Almeida SP (eds) Cerrado: ambiente e flora. Embrapa, Planaltina, pp 89–166

Sazima I, Buzato S, Sazima M (1995) The saw-billed hermit Ramphodon naevius and its flowers in southeastern Brazil. J Ornithol 136:195–206

Sokal RR, Rohlf FJ (1981) Biometry, 2nd edn. Freeman, New York

Stiles FG, Wolf LL (1970) Hummingbird territoriality at a tropical flowering tree. Auk 87:467–491

Wolf LL, Hainsworth FR (1971) Time and energy budgets of territorial hummingbirds. Ecology 52:980–988