Barnard, M. E., Strandburg-Peshkin, A., Yarett, I. R., & Merz, R. A. (2012). The blue streak: A dynamic trait in the mud fiddler crab, Uca pugnax. Invertebrate Biology, 131(1), 52-60. doi:10.1111/j.1744-7410.2011.00256.x.