Lewis's woodpecker (Melanerpes lewis) are some of the most vibrant winter birds on Tejon Ranch. Photo courtesy of Chris Gardner |
One of the great joys of observing nature closely is
witnessing how the world around us changes throughout the year. In this part of
the world, the most spectacular time to observe these phenological events is from
March-May, when wildflowers produce a riot of color, insects are emerging en
masse, and birds migrating from tropical climes dazzle us with fresh, colorful
plumage.
In contrast, the transition from
fall to winter can appear to be a less impressive time to observe nature in
southern California-- particularly in a drought year. The hills have been brown
for months and shortening days often yield less observation time. Although it
may be more subtle, major changes are actually happening during fall in inland
California. Just as with spring, there are plants blooming, such as many of the
annual buckwheats (Eriogonum sp.), and
birds are migrating with just as much urgency to avoid the cold of northern
climates as when they come this way to breed.
Red-breasted nuthatch by Snowmanradio, Wikimedia Commons |
One of my favorite things to observe is how the changing of the seasons can prompt birds to move up or down-slope. Red-breasted nuthatch (Sitta Canadensis), for instance, is a year-round resident of the high elevation fir forests of Mt. Pinos. However, when the pine nuts and acorns start to mature, these pert little birds make their way down into my neighborhood. I usually hear them before I see them, with their “yank yank yank” call echoing through the trees.
Another local migrant is the
cryptic brown creeper (Certhia americana),
which most often looks like a small chunk of moving bark on a tree.
Unlike the nuthatches, who often face toward the ground as they forage on a
tree, creepers typically face toward the top of the tree. Much like the
nuthatches, brown creepers are usually heard before seen (if they are seen at
all). Their thin seee call echoes
through the canopy and the jubilation of their song are always a treat to hear in the dead of winter.
Brown creepers typically face up the trunk of the tree when foraging. |
Joining
us from more northerly climes are the Zonotrichia
sparrows, which are large-bodied, long-tailed sparrows with bold head and face
patterns. Of the four U.S. species in this genus, two are common winter
residents of the Tejon Ranch region. White-crowned sparrows (Zonotrichia leucophys) are typically
most abundant, inhabiting brush piles, shrubs, and open fields next to dense
vegetation. Golden-crowned sparrows (Zonotrichia
atricapilla) are also numerous, singing their mournful “Oh dear meeeeee” song. Both species tend to aggregate in large flocks, so if you
see one of these sparrows, you are likely to see dozens.
White-crowned sparrows brave this area's coldest weather. Photo courtesy of Chuck Noble |
Golden-crowned sparrow look similar to their white-crowned cousins, but have a distinctive gold stripe down the middle of their heads. Photo by berichard, Wikimedia Commons |
Hermit thrushes have a spotted breast and an eye ring. |
Of the
birds that tend to pass through our region during migration, one of the most
impressively-colored is the red-breasted sapsucker (Sphyrapicus ruber). These quiet woodpeckers have the interesting
habit of drilling holes (or “wells”) in concentric circles around a tree’s
trunk. These wells begin to weep sap, which is a sweet treat for the birds as
well as insects, which are also part of the sapsucker’s diet. A few weeks ago,
while taking a walk around the block with my family, we spotted two
red-breasted sapsuckers calling to each other and flying from tree to tree.
What also caught my eye was a group of Steller’s jays (Cyanocitta stelleri) following the sapsuckers in close pursuit. It
seemed to me that the jays wanted a little piece of the action and were
probably conspiring to bully the sapsuckers away from the trees and feast off
of the woodpecker’s hard work.
Red-breasted sapsucker drilling wells on a pine tree. |
Lewis's woodpecker. Photo courtesy of Chuck Noble |
With the small shot of
precipitation last weekend, I can’t help but feel excited for the life that it
will sustain. With a little bit of luck, our migrant and resident winter birds
will have the resources they need to survive another season. I look forward to
watching these stories unfold over the next few months as our day length wanes
and the quiet chill of winter settles in once again.
PHOTO LINKS
Golden-crowned sparrow by Linda Tanner.
http://commons.wikimedia.org/wiki/File:Zonotrichia_atricapilla_4.jpg Accessed 11/6/2014.
Red-breasted nuthatch by Snowmanradio.
Accessed 11/6/2014
PHOTO LINKS
Golden-crowned sparrow by Linda Tanner.
http://commons.wikimedia.org/wiki/File:Zonotrichia_atricapilla_4.jpg Accessed 11/6/2014.
Red-breasted nuthatch by Snowmanradio.
Accessed 11/6/2014