 In 2005, the City of Palo Alto received a grant from the California Coastal Conservancy to daylight the Mayfly Creek tributary to Arastradero Creek.This tributary was buried in a culvert under a horse ranch that had been purchased from the Bressler family with help from the Peninsula Open Space Trust.According to Grassroots Ecology Senior Ecologist, Claire Elliott, sinuous, ephemeral Mayfly Creek was named for the mayfly (family "Ephemeroptera"), as it was the first insect to re-colonize the daylighted creek.