- Author: Kathy Keatley Garvey
Seen any cabbage whites lately?
If you capture one before UC Davis professor Arthur Shapiro does, he'll trade you a beer for your butterfly. Actually, a pitcher of beer or its cash equivalent.
Yes, it's time for Shapiro's 38th annual Butterfly-for-Beer contest. The "state-of-the-Art" rules are easy: the first person to find and capture a live cabbage white butterfly outdoors in California's Central Valley (Sacramento, Solano or Yolo counties) after the first of the year, will win a pitcher of beer. You get the beer, he gets the butterfly. He gets the data, you get the recognition.
Shapiro, a noted lepidopterest equally renowned for his heavily accessed UC Davis butterfly site and field guide about butterflies in the San Francisco Bay and Sacramento Valley regions, almost always finds the first cabbage white of the year. It's tough to beat him because he knows where to look. Most likely the cabbage white will be in a vacant lot or by a roadside where wild mustards grow. It probably won't be in your backyard garden or neighborhood park.
The cabbage white is the Pieris rapae, a white or buff-colored butterfly about 1-1/4 inches long. It sports a black spot or spots near its wing base. The underside of its hindwing is yellow with a grayish cast.
The cabbage white is emerging about a week earlier than it did 30 years ago, Shapiro says. When was the first specimen found in 2008? Jan. 19.
Entries should be delivered to the receptionist in the Evolution and Ecology office, 2320 Storer Hall. Be sure to include when (time and date) you found it and where you found it. If it's on the weekend, when the UC Davis office is closed, store it live for a few days in your refrigerator.
Here's a photo I captured of two cabbage whites in Vacaville, Solano County on Sept. 7, 2008--about eight months too late for Shapiro's competition.
And no beer.