Hartmann Bakken, B. et al. (2008) A nectar-feeding mammal avoids body fluid disturbance by varying renal function. Am. J. Physiol.  Renal Physiol. 295: F-1855-F-1863 (PDF)

Rodriguez-Peña, N, K. E. Stoner, J. E. Schondube, J. Ayala, C. M. Florez-Ortiz, and Carlos Martínez del Rio. 2008. Effects of sugar composition and concentration on food selection by Saussure’s long-nosed bat (Leptonycteris curasoae) and the long-tongued bat (Glossophaga soricina). Journal of mammalogy 88: 1466-1474

Ayala, J., J. E. Schondube, N.K. Rodriguez-Peña, K. E. Stoner, and C. Martínez del Rio. The intake responses of three species of leaf-nosed Neotropical bats. Journal of Comparative Physiology B 178: 477-485.

-Welch, K. C., B. Hartmann Bakken, C. Martínez del Rio, and R. K. Suarez. 2006. Hummingbird fuel hovering flight with newly-ingested sugar. Physiological and Biochemical Zoology 79: 1082-1087

-Carleton, S., B. H. Bakken, and C. Martínez del Rio. 2006. Do hummingbirds fuel energy metabolism with reserves or income? Journal of Experimental Biology 209: 2622-2627

-Tsahar, E., Z. Arad., I. Izhaki, and C. Martínez del Rio. 2006. Do nectar- and fruit-eating birds have lower nitrogen requirements? An allometric test. The Auk 123: 1004-1012.

-Sabat, P., K. Maldonado, and C. Martínez del Rio. 2006. Osmoregulatory capacity and the ability to use marine food sources in two coastal songbirds (Cinclodes: Furnariidae) along a latitudinal gradient. Oecologia 148: 250-257.

-McWhorter, T.,  B. H. Bakken, W. H. Karasov, and C. Martínez del Rio. 2006. Hummingbirds rely on passive intestinal glucose absorption to fuel high metabolism. Biology Letters 2: 131-134.

Tsahar, E., C. Martínez del Rio, I. Izhaki, and Z. Arad. 2005. Can birds be ammonotelic? Nitrogen balance and excretion in two frugivores Journal of Experimental Biology 208: 1025-1034.

Tsahar, E., C. Martínez del Rio, Z. Arad, J. Joy, and I. Izhaki. 2005. Are the low protein requirements of nectarivorous birds the consequence of their sugary and watery diet? – a test with an omnivore. Physiological and Biochemical Zoology 78: 239-245.

Martínez del Rio, C. and B. Wolf. 2005. Mass-balance models for animal isotopic ecology. Pp. 141-174 in Starck,, J. M. and T. Wang. Physiological and ecological adaptations to feeding in vertebrates. Science Publishers, Enfield, NH. (PDF)

Hartman Bakken, B., McWhorter, T.J., Tsahar, E. and Martínez del Rio, C. 2004. Hummingbirds arrest their kidneys at night: diel variation in glomerular filtration rate in Selasphorus platycercus. J. Exp. Biol. 207 : 4383-4391.

Carleton, S., B. O. Wolf, and C. Martínez del Rio. 2004. Keeling plots for hummingbirds: measuring 13C in the exhaled CO2 of small animals. Oecologia 144: 141: 1-6. (PDF)

McWhorter, T., C. Martínez del Rio, B. Pinshow, and L. Roxburgh. 2004. Renal function in Palestine sunbirds. Elimination of excess water does not constrain energy intake. J. Exp. Biol 207:  3391-3398. (Error! Hyperlink reference not valid.)

Schondube, J. and C. Martínez del Rio. 2004. Sugar and protein digestion in flowerpiercers and hummingbirds: a comparative test of adaptive convergence. Journal of Comparative Physiology B. 174: 263-273. (PDF)

Lotz, C. , C, Martínez del Rio, and S. W. Nicolson. 2004. The ability of rufous hummingbirds (Selasphorus rufus) to dilute and concentrate excreta. Journal of Avian Biology 35: 54-62. (PDF)

Schondube, J. E. and C. Martínez del Rio.2003. Concentration-dependent sugar preferences in nectar-feeding birds: mechanisms and consequences. Functional Ecology 17: 445-453. (PDF)

Martínez del Rio, C., B. O. Wolf, and R. Haughey. 2003. Saguaros and white-winged doves: the natural history of an uneasy partnership. In Nabhan, G. (ed.). Conserving Migratory Pollinators and Nectar Corridors in Western North America. Univ. of California Press (no pdf available)

Lotz, C. and C, Martínez del Rio. 2003. Hummingbirds pay a high cost for a warm drink. J. Comp. Phys. B 173: 455-462. (PDF)

McWhorter, T., D. Powers, and C. Martínez del Rio. 2003. Are hummingbirds facultatively ammonotelic? Nitrogen excretion and requirements as a function of body size. Physiological and Biochemical Zoology 76: 731-743.  (PDF)

McWhorter, T., C. Martínez del Rio, and B. Pinshow. 2003 Modulation of ingested water absorption by Palestine sunbirds: evidence for adaptive regulation. Journal of Experimental Biology 206: 659-666. (PDF)

Schondube, J. E. and C. Martínez del Rio. 2002 A bill with a hook: experimental evidence of a tradeoff in the morphology of flowerpiercers. Proceedings of The Royal Society of London B. 1511: 195-198.

Levey, D. J. and C. Martínez del Rio. 2001. It takes guts (and more…) to eat fruit: Lessons  from avian nutritional ecology. The Auk 118: 819-830.

Witmer, M. C. and C. Martínez del Rio. 2001. The intestinal enzymes of cedar waxwings and thrushes. Physiological and Biochemical Zoology 74: 584-593.

Martínez del Rio, C., J. E. Schondube, and T. McWhorter. 2001. Intake responses in nectar-feeding birds: digestive and metabolic causes, osmoregulatory consequences, and coevolutionary effects. American Zoologist 41: 902-915

Schondube, J., C. Martínez del Rio, and  L.G. Herrera. 2001. Diet and the evolution of digestion and renal function in phyllostomid bats. Zoology 104: 59-74.

Herrera, L. G., C. Martínez del Rio, E. Braun and K. Hobson. 2001. Renal structure in phyllostomid bats: using stable isotopes to explore relationships between diet and morphology. Isotopes in Environment and Health Science 37: 1-11.

McWhorter, T. and C. Martínez del Rio. 2000. Does gut function limit hummingbird food intake? Physiological and Biochemical Zoology 73: 313-324. (PDF)

O’Brien, D., D. Schrag, and C. Martínez del Rio. 2000. Allocation of nectar nutrients to reproduction in Amphion floridensis: a novel quantitative method using stable isotopes. Ecology 81: 2822-2831.

Levey, D. J. and C. Martínez del Rio. 1999. Tests, rejection, and reformulation of a guts as reactors optimal digestion model in a frugivorous bird. Physiological Zoology 72: 369-383.

McWhorter, T.J. and Martínez del Rio, C. 1999. Food ingestion and water turnover in hummingbirds: How much dietary water is absorbed? The Journal of Experimental Biology 202: 2851-2858. (PDF)

Streumpf, H. M., and C. Martínez del Rio. 1999. Amygdalin, a cyanogenic glycoside in ripe fruit does not deter consumption by cedar waxwings. The Auk 116: 749-758.

Herrera, G. and C. Martínez del Rio. 1998. Pollen digestion by New World bats. Effects of processing time and feeding habits. Ecology 79: 2828-2838.

Martínez del Rio C. and C. Restrepo. 1993. Ecological and behavioral consequences of digestion in frugivorous animals. Vegetatio 107/108: 205-216.

Hernandez, A., and C. Martínez del Rio. 1992. Intestinal disaccharidases of five  species of phyllostomoid bats with contrasting feeding habits. Comparative Biochemistry and Physiology 103B: 105-111.

Martínez del Rio, C., H. G. Baker and I. Baker . 1992. Ecological and evolutionary implications of digestive processes: bird preferences and the sugar constituents of floral nectar and fruit pulp. Experientia 48: 544-550.

Gryj, E., C. Martínez del Rio and  I. Baker. 1990. Avian pollination and nectar  use in Combretum fruticosum  Biotropica 22: 266-271.

Martínez del Rio, C. 1990. Sugar preferences in hummingbirds: the influence of subtle chemical differences on food choice. The Condor 92: 1022-1030.

Martínez del Rio, C. 1990. Dietary and phylogenetic correlates of intestinal sucrase and maltase activity in birds. Physiological Zoology  63: 987- 1011.

Martínez del Rio, C. and W. H. Karasov. 1990. Digestion strategies in fruit and nectar eating birds and the sugar composition of plant rewards. The American Naturalist 136: 618-637.

Martínez del Rio, C. W. H. Karasov and D. J. Levey. 1989. Physiological basis and ecological correlates of sugar preferences in a North American  frugivore, the Cedar Waxwing. The Auk 106: 64-71.

Martínez del Rio, C. and B. R., Stevens. 1989. Physiological on feeding behavior: the intestinal brush border membrane disaccharidases of the European Starling. Science 243: 794-796.

Martínez del Rio, C., B. R. Stevens, D. E. Daneke and P. T. Andreadis. 1988. Physiological correlates of preference and aversion for sugars in  three species of birds. Physiological Zoology 61: 222-229.