Burrowing Owls in San Jose
By Lisa Eileen Hern
I can’t remember what year it was when I fell in love with Burrowing Owls, but I clearly remember being at Shoreline Park in Mountain View in the spring, and looking down at green grass with lots of yellow eyes peering up at me from holes in the ground. Owls, in the ground! Once I gazed further into those gorgeous eyes, I knew I was in love. I have since become a docent in Golden Gate Bird Alliance’s Burrowing Owl program in Cesar Chavez Park in Berkeley.
The GGBA program has only a small number of owls in its area – six in the winter of 2012-13, four last winter, and two this winter. So I was very interested when I heard about the large, successful Burrowing Owl conservation program being run by Santa Clara Valley Audubon in northern San Jose.
Burrowing Owls in San Jose / Photo courtesy of Santa Clara Valley Audubon Society
Burrowing Owl in San Jose / Photo courtesy of Santa Clara Valley Audubon Society
Josh McCluskey — one of the leads of the SCVAS owl program — gave a public lecture on January 21 about the 180-acre section of Regional Wastewater Facility buffer lands that they manage for Burrowing Owls in a partnership with the City of San Jose. SCVAS’s ultimate goal is to create, maintain and monitor an ideal owl habitat.
One of their tactics is to provide more burrows. Although Burrowing Owls traditionally adopt burrows made by other species such as squirrels, SCVAS has had great success with artificial burrows — attracting pairs that have produced an average of 4.8 chicks per year (versus about three for other Burrowing Owls in the area).
SCVAS also works to provide fruitful hunting habitat and plentiful prey for the owls by keeping the grass less then one meter high and maintaining an open area without trees but with lots of dirt mounds and rock piles.
Most importantly, they’re trying to limit predation. They set traps for skunks, which are the owls’ main predators. (Other predators include Prairie Falcons, Golden Eagles, hawks, and possums.)
Golden Eagle hunting for Burrowing Owls / Photo courtesy of Santa Clara Valley Audubon Society
SCVAS tries to track the owl population through banding, although this is hampered by the lack of a central repository for Burrowing Owl banding information. Many of the banded owls are never reported again.…