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The Acorn Camarillo Acorn Moorpark Acorn - Simi Valley Acorn |
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Flights of fancy
I also appreciated the pastime of bird watching. In the heart of the San Fernando Valley with thousands of people, cars and buildings; nature also surrounded me. Birdwatching is fantastic, it can be done anywhere; in parking lots, while driving, waiting for appointments and certainly in the wilderness. For every habitat and environment, some species of bird has adapted to make that area their home. One step is learning to identify birds, but that is only the tip of the iceberg. A practiced watcher recognizes the different calls of individual species and will begin to interpret the meaning of different behaviors. Spring is one of my favorite times to watch birds. As with all species of wildlife (including humans), hormones seem to be running high and there are elaborate displays from birds desperately trying to get the attention of the opposite sex.
For most birds, late winter and early spring signal a time of mating, which coincides with a new molt. All of the birds' winter feathers are exchanged for newer brightly colored plumage. This molt is called breeding plumage or alternate plumage. In fall birds undergo another molt where only the head and body feathers are replaced. Some birds also undergo a partial molt after breeding season, replacing their bright feathers with drab colors so as not to attract attention while attending young. Showing off In addition to color changes in spring, bird watchers also notice elaborate displays in behavior. These displays can be divided between visual displays and auditory displays. While it is difficult to describe auditory displays in written word, visual behaviors you may see are the flashing long white feathers of the great egret or the dance of the western grebe. Hummingbirds take huge dives earthward whistling their way down and at the last minute turn skyward, completing a huge circle. Redtailed hawks soar in circles around each other with legs down, letting out piercing cries. Recently I was privy to a display I had not yet seen, that of the northern red-shafted flicker, Colaptes auratus. Three males were hopping around each other on a juniper. Although they were silent, their communication was poignant. Each male's tail feathers fanned out, the sunlight flashing contrasts of black and red/pink. In addition, bills were pointed upward and necks were stretched long. Each bird shuffled on the branch and then hopped close to another. Although never touching, they were vying for dominance; each trying to gain prominence over the other. I diligently looked for a nearby female but could not find her. Accidentally I startled the birds and they flew off to another tree and began the ritual again, this time with loud boisterous calls and bill drumming. Why the display? Returning home I began reading about flicker behavior. The display observed is used for two purposes. Between males it is generally about competition for a mate or, rarely, over territory. When this behavior is displayed between a male and a female it indicates courtship. Thus when watching this display it is important to be able to distinguish males from females. The northern flicker grows to approximately 12.5 inches with a wingspan of 20 inches. There is little size difference between males and females. The breast is tan with black spots and a broad black chest band. The back and wings are brownish with black banding. When flying a white rump is exposed. The undersides of the tail and wings are red/pink. The head is gray with a tan face; being a species of woodpecker, the flicker's bill is long and sturdy. On the face, males have a prominent red streak stretching from the base of the bill across their cheek. This streak is absent in females. As flickers usually mate for life and return to the same breeding grounds year after year, territory and courtship displays are prominent this time of year and will continue until about one week before the nestlings fledge in May through July. Watching these birds dance their intentions, I am struck by the beauty of their communication as they flash their colors and drum their creed. I ponder what dances humanity displays to proclaim intentions. |
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