Gulf of Mexico, western Pacific Ocean, Indian Ocean
Dronen, N. O., and H. W. Chen. 2002. Endohelminths from the little blue heron Egretta caerulea from the Texas Gulf Coast. Comparative Parasitology 69: 96–99.
Forrester, D. J., and M. G. Spalding. 2003. Parasites and Disease of Wild Birds in Florida. University Press of Florida, Gainesville, Florida. 1133 pp.
Sepulveda, M. S., M. G. Spalding, J. M. Kinsella, and D. J. Forrester. 1996. Parasitic helminths of the little blue heron, Egretta caerulea, in southern Florida. Journal of the Helminthological Society of Washington 63: 136–140.
Added keyword "parasitic"
Overstreet, R. M., J. O. Cook, and R. W. Heard. 2009. Trematoda (Platyhelminthes) of the Gulf of Mexico, Pp. 419–486 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
Harte Research Institute for Gulf of Mexico Studies. 2016. GulfBase: Resource Database for Gulf of Mexico Research, Education, and Management. Texas A&M University-Corpus Christi. World Wide Web electronic publication. http://www.gulfbase.org, 05-30-2020.