Role Reversal 5 Strange Tales of Animal Male Pregnancies

Male pregnancy is a rare but real phenomenon in the animal kingdom.

In some instances, male pregnancy is the result of man-made chemicals having strange effects on male frogs and bass, prompting weird intersex developments. In other situations, male pregnancy is a natural part of how seahorses, pipefish and leafy sea dragons reproduce.

Source:
http://webecoist.com/2010/03/07/role-reversal-5-strange-tales-of-animal-male-pregnancies/

SexChanging Herbicide Makes Amphibians Sick Too

Atrazine is receiving lots of attention for turning male frogs into girls, but thats not all the common herbicide does.

It also weakens amphibian immune systems, leaving the fragile creatures vulnerable to disease.

Source:
http://www.wired.com/wiredscience/2010/03/atrazine-and-disease/