
Star Trails Over Blue Oak
Recently I was at the edge of an oak woodland in California's Diablo Range taking astrophotos; I set up a camera to take star trails, and this is one of the images from that session. In this image you can see the ~violet stars of the Big Dipper in the upper left, and the varied star colors of constellations including Cepheus and Cassiopeia on the right.
This location is adjacent to an ephemeral stream and the image is looking towards a valley. In the ~middle distance below this framing are low mountains peppered with surprising intrusions of igneous rock, perhaps giving rise to its early European name Quien Sabe. This subject tree may mark the edge of the extent of the groundwater from the ephemeral stream, as just beyond there are only scattered trees on the valley floor.
The oak savannas in the area historically were maintained by purposeful application of fire by indigenous groups such as the Amah Mutsun/Ohlone peoples (before their removal to the Spaniards' monasteries), so they could have easier access to acorns, encourage growth of deergrass and sedge for basketry, and to clear vegetation for harvesting of alliums and soaproot. My other camera was set up next to a patch of deergrass, waist high, seedheads not ripe yet.
Throughout the evening I could hear the sporadic calling of the last of the tree frogs, insects advertising their location, coyotes calling and a distant farm dog howling in return, screech owls, deer walking amongst fallen oak branches, and early in the evening the screeching of young wild pigs - sometimes too close for comfort. After the moon rose, I packed up my gear as the insects and other animals quieted down as the moonlight brightened the landscape.
Canon 600D: 18mm f/3.5 ISO 800 205 x 30 seconds, StarStaX, Lightroom, light painting.