We will point out native host plants for female egg-laying along with behaviors like “hill-topping” and “mud- puddling.” Of special interest will be observing which serpentine endemics are being used as nectar sources. We might even glimpse the threatened Bay checkerspot butterfly (Euphydryas editha bayensis).

Bring a sack lunch, water and a hat. If so inclined, bring your camera or binoculars. Wear comfortable hiking shoes. The trip distance will be 4 miles with 500 feet of ascent. Inclement weather will cause us to switch to our alternate date of Saturday, May 7, since butterflies are a no-show on cloudy, overcast days.

Space is limited to 25 people. To reserve your spot and to receive directions and details, please RSVP to Arvind Kumar at arvind.kumar@cnps .org. Cosponsored by CNPS and Santa Clara Valley Open Space Authority.