The Oakland Zoo and the Western Pond Turtle Head Start Program

Comparing a Head Started turtle to one that hibernated in the wild.Alright, I am going to say the “C” word: these little guys are cute! As an environmental professional, I know this is a word I am not supposed to use, but it is impossible not to.

Barely bigger than a quarter, the baby Western Pond Turtles were drawing a cooing crowd of Oakland Zoo staff in their new, but temporary, home in the back room of the Bug House. Here, our animal management staff will happily feed and care for them until they grow big enough to fend for themselves back in their home in Lake County.

Nicholas Geist of Sonoma State University began a study of these natives when he feared that global warming would affect their future. As the sex of baby turtles is determined by temperature, he was curious if future high temperatures would cause only one future sex. In his exploration of the issue, he found these turtles to have some other serious current environmental challenges.

To begin with, development near turtle habitat intrudes upon food availability and nesting sites for females, as they lay their eggs away from the water on the land nearby. American Bullfrogs, a non-native, predate upon the hatchlings, and Red Eared Slider Turtles, also a non-native, compete for basking space and food. These turtles are commonly sold at pet stores without proper instructions and subsequently released by owners thinking they are doing the right thing. They grow twice the size and are more assertive than the Western Pond Turtles, and pretty much take over.

In a partnership with Sonoma County Fish and Wildlife Commission and Sonoma State University, the Head Start program sends Oakland Zoo staff and Sonoma State University students into the wild to collect eggs which are incubated at the university. Once hatched, they are transferred to the zoo to be raised for the first year under optimal conditions. By creating the best possible environment for the turtles, they grow 3-4 times faster than they would in the wild, where they would normally hibernate. At the end of the first year, the juvenile turtles will then be released back into their original lake, having grown too large to be eaten by those pesky bull frogs and the big mouth bass, and able to compete with those bully Red Eared Sliders. They will be bigger, smarter and…head started. Sigh…we will be so proud.

I had the pleasure of briefly meeting Dr. Robert Drewes, the esteemed Curator and Chairman of the Department of Herpetology at the California Academy of Sciences, upon his return from the Gulf of Guinea where he has been leading research teams over the past decade to study the unique flora and fauna of the islands.

He was still tired from his travels, but his exuberant personality and lively sense of humor were still intact despite his jet-lag. He supplied me a DVD of photos that illustrated his adventurous exploits over the years - such as grappling a giant python snake and mucking about in swamps at night in search of specimens – and proof that he certainly had a lot of fun in the field throughout the course of his long and productive career.

Learn more about Dr. Drewes and his passion for Africa and frogs in the “Why I Do Science” profile, and be sure to check out our story “Disappearing Frogs” about Bay Area researchers investigating the decline of frog populations.