Contains a file of RPKM expression data for each of the six species. APL = Anas platyrhynchos, ACY = Anser cygnoides, MGA = Meleagris gallopavo, NME = Numida meleagris, PCO = Phasianus colchicus, PCR = Pavo cristatus. Gene expression was quantified using only adult gonad samples and estimated as reads per kilobase per million mappable reads (RPKM) using RSEM v1.1.21 with default parameters (Li and Dewey 2011)