Title: Did extreme nest predation favor the evolution of obligate brood parasitism in a duck? Journal: Ecology and Evolution Authors: Bruce E. Lyon, Alejandra Carminati, Geneviève Goggin, and John M. Eadie Contact B.E. Lyon belyon@ucsc.edu Contact A. Carminati alejandracarminati@yahoo.com.ar Contact G. Goggin gengoggin@gmail.com Contact J.M. Eadie jmeadie@ucdavis.edu Datasheet: NEST SURVIVAL DATA Data sheet centered on nest survival of eggs in artificial nests and active real host nests Nest ID # The unique name or ID number we gave to each nest to keep track of the nests Wetland One of the two study wetlands on Estanicias Palenque and Cari Lauquen. Nest treatment There were three nest situation treatments in the artificial nest experiment (high density, low density, gull colony) and three host species treatments in the active host nests (red-gartered coot, red-fronted coot, brown-hooded gull) Egg treatment The egg treatments varied between the artificial nests and active nests. Experimental nests received either two brown coot-like eggs or one brown coot like egg and one coot-like egg. The active host nests received a single egg; either a white duck like egg or a an egg painted with a background color like the host (brownish for the two coots, greenish for the gull). Survive to censor day Whether a nest was depredated. N means nest was depredated by the time the experiment was completed, Y means the nest survived to the end of the experiment Day recorded as depredated Day 0 is the day an experiment was set up. This variable either reports the first day a nest was checked and found depredated or for nests never depredated the last check. or censor day for last visit censored 1 means censored, namely the nest survived to the end of the last planned census, 0 means the nest was not censored because it did not survive until the last census visit