Birds will head to Mexico for the winter By ERNIE COWAN While the civilized world seems to struggle in turmoil right now, the natural clock of ages faithfully ticks on. As another August slips from the calendar, the beat of nature goes on, and the happy visitors to my summer garden are hearing the call to launch them on a journey south. We can’t hear this call, but the hooded orioles do, and they are eagerly preparing to return to some preordained place in Mexico for the winter. These beautiful birds have added color, sound and joy to Mt. Whoville, as they have for thousands of other bird lovers throughout Southern California who provide food, water and nesting sites. A week ago, I began to notice fewer brightly colored males, and this week the males are gone. This is typical, with males leaving first, followed by females and the late-crop juveniles. For the past few weeks the orioles have been feeding aggressively at the nectar feeders, quibbling and cackling as they alway...