Ashby, E. (1912). The Malurus. Emu, 11, 254.Google Scholar

Badyaev, A. V., Schwabl, H. G., Young, R. L., Duckworth, R. A., Navara, K. J., et al. (2005). Adaptive sex differences in growth of pre-ovulation oocytes in a passerine bird. Proc. R. Soc. London B, 272, 2165–2172.Google Scholar

Blanchard, L. (2000). An investigation of the communal breeding system of the smooth-billed ani (Crotophaga ani). M.Sc. thesis, McMaster University, Hamilton, Ontario, Canada.Google Scholar

Board, R. G. and Perrott, H. R. (1979). Vaterite, a constituent of the eggshells of the nonparasitic cuckoos, Guira guira and Crogophaga ani. Calcif. Tissue Int., 29, 63–69.CrossRefGoogle Scholar

Boland, C. R. J. and Cockburn, A. (2002). Short sketches from the long history of cooperative breeding in Australian birds. Emu, 102, 9–17.CrossRefGoogle Scholar

Cariello, M. O., Schwabl, H. G., Lee, R. W., and Macedo, R. H. (2002). Individual female clutch identification through yolk protein electrophoresis in the communally-breeding guira cuckoo (Guira guira). Mol. Ecol., 11, 2417–2424.CrossRefGoogle ScholarPubMed

Cariello, M. O., Lima, M. R., Schwabl, H. G., and Macedo, R. H. (2004). Egg characteristics are unreliable in determining maternity in communal clutches of guira cuckoos Guira guira. J. Avian Biol., 35, 117–124.CrossRefGoogle Scholar

Cariello, M. O., Macedo, R. H., and Schwabl, H. G. (2006). Maternal androgens in eggs of communally breeding guira cuckoos (Guira guira). Horm. Behav., 49, 654–662.CrossRefGoogle ScholarPubMed

Davis, D. E. (1940). Social nesting habits of the smooth-billed ani. Auk, 57, 179–218.Google Scholar

Davis, D. E. (1941). Social nesting habits of Crotophaga major. Auk, 58, 179–183.CrossRefGoogle Scholar

Davis, D. E. (1942). The phylogeny of social nesting habits in the Crotophaginae. Q. Rev. Biol., 17, 115–134.CrossRefGoogle Scholar

Drummond, H., Rodríguez, C., and Schwabl, H. G. (2008). Do mothers regulate facultative and obligate siblicide by differentially provisioning eggs with hormones? J. Avian Biol., 39, 139–143.CrossRefGoogle Scholar

Emlen, S. T. and Vehrencamp, S. (1985). Cooperative breeding strategies among birds. In: Experimental Behavioral Ecology, ed. Hölldobler, B. and Lindauer, M.. Stuttgart: Gustav Fischer, pp. 359–374.Google Scholar

Farley, J. A. (1924). Argentine birds. Auk, 41, 169–170.Google Scholar

Hrdy, S. B. (1979). Infanticide among animals: a review, classification, and examination of the implications for the reproductive strategies of females. Ethol. Sociobiol., 1, 13–40.CrossRefGoogle Scholar

Koenig, W. D. (1990). Opportunity of parentage and nest destruction in polygynandrous acorn woodpeckers, Melanerpes formicivorus. Behav. Ecol., 1, 55–61.CrossRefGoogle Scholar

Koford, R. R., Bowen, B. S., and Vehrencamp, S. L. (1990). Groove-billed anis: joint-nesting in a tropical cuckoo. In: Cooperative Breeding in Birds: Long-term Studies of Ecology and Behavior, ed. Stacey, P. B. and Koenig, W. D.. Cambridge: Cambridge University Press, pp. 335–355.Google Scholar

Lack, D. (1947). The significance of clutch size. Ibis, 89, 302–352.CrossRefGoogle Scholar

Lack, D. (1954). The Natural Regulation of Animal Numbers. London: Oxford University Press.Google Scholar

Lima, M. R., Macedo, R. H., Muniz, L., Pacheco, A., and Graves, J. (2011). Group composition, mating system and relatedness in the communally breeding guira cuckoo in central Brazil. Auk, 128, 475–486.CrossRefGoogle Scholar

Loflin, R. K. (1983). Communal behaviors of the smooth-billed ani (Crotophaga ani). Ph.D. thesis, University of Miami, Coral Gables, Florida.Google Scholar

Macedo, R. H. (1992). Reproductive patterns and social organization of the communal guira cuckoo (Guira guira) in central Brazil. Auk, 109, 786–799.CrossRefGoogle Scholar

Macedo, R. H. (1994). Inequities in parental effort and costs of communal breeding in the guira cuckoo. Neotr. Ornithol., 5, 79–90.Google Scholar

Macedo, R. H. and Bianchi, C. (1997). Communal breeding in tropical guira cuckoos Guira guira: sociality in the absence of a saturated habitat. J. Avian Biol., 28, 207–215.CrossRefGoogle Scholar

Macedo, R. H. and Melo, C. (1999). Confirmation of infanticide in the communally breeding guira cuckoo. Auk, 116, 847–851.Google Scholar

Macedo, R. H., Cariello, M. O., and Muniz, L. (2001). Context and frequency of infanticide in communally breeding guira cuckoos. Condor, 103, 170–175.CrossRefGoogle Scholar

Macedo, R. H., Cariello, M. O., Graves, J., and Schwabl, H. (2004a). Reproductive partitioning in communally breeding guira cuckoos, Guira guira. Behav. Ecol. Sociobiol., 55, 213–222.Google Scholar

Macedo, R. H., Cariello, M. O., Pacheco, A., and Schwabl, H. (2004b). Significance of social parameters on differential nutrient investment in guira cuckoo (Guira guira) eggs. Anim. Behav., 68, 485–494.CrossRefGoogle Scholar

Magrath, R. D., Johnstone, R. A., and Heinsohn, R. G. (2004). Reproductive skew. In: Ecology and Evolution of Cooperative Breeding in Birds, ed. Koenig, W. D. and Dickinson, J. L.. Cambridge: Cambridge University Press, pp. 157–176.CrossRefGoogle Scholar

Paquet, M., Covas, R., Chastel, O., Parenteau, C., and Doutrelant, C. (2013). Maternal effects in relation to helper presence in the cooperatively breeding sociable weaver. PLoS One, 8, e59336.CrossRefGoogle ScholarPubMed

Pinheiro, F., Diniz, I. R., Coelho, D., and Bandeira, M. P. S. (2002). Seasonal pattern of insect abundance in the Brazilian cerrado. Austral Ecol., 27, 132–136.CrossRefGoogle Scholar

Quinn, J. S. and Startek-Foote, J. M. (2000). Smooth-billed ani (Crotophaga ani). In The Birds of North America, ed. Poole, A.. Ithaca: Cornell Lab of Ornithology; retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/539Google Scholar

Quinn, J. S., Macedo, R. H., and White, B. N. (1994). Genetic relatedness of communally breeding guira cuckoos. Anim. Behav., 47, 515–529.CrossRefGoogle Scholar

Quinn, J. S., Samuelsen, A., Barclay, M., Schmaltz, G., and Kahn, H. (2010). Circumstantial evidence for infanticide of chicks of the communal smooth-billed ani (Crotophaga ani). Wilson J. Ornithol., 122, 369–374.CrossRefGoogle Scholar

Riehl, C. (2010a). A simple rule reduces costs of extragroup parasitism in a communally breeding bird. Curr. Biol., 20, 1830–1833.CrossRefGoogle Scholar

Riehl, C. (2010b). Egg ejection risk and hatching asynchrony predict egg mass in a communally breeding cuckoo, the greater ani (Crotophaga major). Behav. Ecol., 21, 676–683.CrossRefGoogle Scholar

Riehl, C. (2011). Living with strangers: direct benefits favour non-kin cooperation in a communally nesting bird. Proc. R. Soc. London B, 278, 1728–1735.Google Scholar

Riehl, C. (2012). Mating system and reproductive skew in a communally breeding cuckoo: hard-working males do not sire more young. Anim. Behav., 84, 707–714.CrossRefGoogle Scholar

Riehl, C. and Jara, L. (2009). Natural history and reproductive biology of the communally breeding greater ani (Crotophaga major) at Gatún Lake, Panama. Wilson J. Ornithol., 121, 679–687.CrossRefGoogle Scholar

Schmaltz, G., Quinn, J. S., and Lenz, C. (2008a). Competition and waste in the communally breeding smooth-billed ani: effects of group size on egg-laying behaviour. Anim. Behav., 76, 153–162.CrossRefGoogle Scholar

Schmaltz, G., Quinn, J. S., and Schoech, S. J. (2008b). Do group size and laying order influence maternal deposition of testosterone in smooth-billed ani eggs? Horm. Behav., 53, 82–89.CrossRefGoogle ScholarPubMed

Schwabl, H., Mock, D. W., and Gieg, J. A. (1997). A hormonal mechanism for parental favouritism. Nature, 386, 231.CrossRefGoogle Scholar

Selander, R. K. (1964). Speciation in wrens of the genus Campylorhynchus. Univ. Calif. Publ. Zool., 74, 1–305.Google Scholar

Sheldon, B. C. (2000). Differential allocation: tests, mechanisms and implications. Trends Ecol. Evol., 15, 397–402.CrossRefGoogle ScholarPubMed

Sick, H. (2001). Ornitologia Brasileira, 3rd edn. de Janeiro, Rio, Brazil: Editora Nova Fronteira.Google Scholar

Silva, N. A. P., Frizzas, M. R., and Oliveira, C. M. (2011). Seasonality in insect abundance in the “Cerrado” of Goiás State, Brazil. Rev. Bras. Entomol., 55, 79–87.CrossRefGoogle Scholar

Skutch, A. F. (1959). Life history of the groove-billed ani. Auk, 76, 281–317.CrossRefGoogle Scholar

Startek, J. M. (1997). Microsatellite DNA analysis of the communal breeding system of the smooth-billed ani (Crotophaga ani) in southwest Puerto Rico. M.Sc. thesis, McMaster University, Hamilton, Ontario, Canada.Google Scholar

Vehrencamp, S. L. (1977). Relative fecundity and parental effort in communally nesting anis, Crotophaga sulcirostris. Science, 197, 403–405.Google ScholarPubMed

Vehrencamp, S. L. (1978). The adaptive significance of communal nesting in groove-billed anis (Crotophaga sulcirostris). Behav. Ecol. Sociobiol., 4, 1–33.CrossRefGoogle Scholar

Vehrencamp, S. L., Bowen, B. S., and Koford, R. R. (1986). Breeding roles and pairing patterns within communal groups of groove-billed anis. Anim. Behav., 34, 347–366.CrossRefGoogle Scholar

Vehrencamp, S. L. and Quinn, J. S. (2004). Joint laying systems. In: Ecology and Evolution of Cooperative Breeding in Birds, ed. Koenig, W. D. and Dickinson, J. L.. Cambridge: Cambridge University Press, pp. 177–196.CrossRefGoogle Scholar

Williams, T. D. (1994). Intraspecific variation in egg size and egg composition in birds: effects on offspring fitness. Biol. Rev., 68, 35–59.CrossRefGoogle Scholar