Baby rattlesnakes!

Last week, one of our gravid ("pregnant") female rattlesnakes gave birth! Rattlesnakes are unusual in that they retain the embryos inside the female's body, incubate the internalized eggs throughout the warm summer months, and give live birth toward the end of summer. The picture is of one of 6 observed offspring from the female we call Colt-45 (the radio frequency that her implanted transmitter emits is 045), with a Bic added by a student for scale. They are small versions of the adults at about 6-8 inches in length, with only a tiny button for a rattle. Their mother will stay with them for up to two weeks in the birthing shelter, or rookery, protecting them from predators and other danger. They will soon shed their skin for the first time and then follow their mother's scent to the den to overwinter. The healthy birth of at least 6 babies is incredibly exciting for our conservation project, as it ensures that this new addition to the population will utilize the den at our relocation site and that they will establish themselves there as permanent residents.