Description: California bumblebee (Bombus californicus) You are free to use this image with the following photo credit: Peter Pearsall/U.S. Fish and Wildlife Service. Date: 18 December 2015, 19:02. Source: bombus_castilleja. Author: USFWS - Pacific Region. Other versions: This file has an extracted image: File:Bombus castilleja (23755590341) (cropped).jpg..