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By Phil Helsel
California out of Sutherland Country is very crowded with an annual movement of butterflies called a pencil woman. In the past, the skies in some areas have been filled with the winged creatures.
People took social media to record the insects flying around California. The butterflies travel from the wilderness of Mexico and fly as long as their reserves last last before breeding. Generations of insects can travel to the North Pacific all the way.
"We've been waiting for them to get up here, but they haven't shown yet," said Arthur M. Shapiro, Professor of University of California, the Department of Evolution and Davis, Davis of Biological Sciences. , which is near Sacramento.
“Years of the marvelous flower flowers of the women years have been heavily painted," he said, saying that the last one was in 2005 with an estimate of billions of butterflies.
Shapiro said he was reporting the reports on the butterflies. vanessa cardui, in Temecula, north of San Diego, and in the State Park of Desert Anza-Borrego, as well as in Pasadena and Coachella Valley.
The entire North American population of butterflies of migrants migrates to the west of Texas and North Mexico during the winter. As caterpillars, they eat growing annual plants – their favorite families are, slowows, cows, and thistles and their friends – and then one butterfly, they start to travel north.
They can live for up to six weeks, but most don't live so long. Migration waves will be like the first generation left to the north of California, breeding and then the next generation makes a journey to the Pacific Ocean north-west, Shapiro said.
On the way back, other generations of butterflies will begin their journey south. In California, the largest population of butterflies is expected on the eastern side of Sierra Nevada, Shapiro said.
"The south side is not as big as northward migration," he said.
A similar thing is happening in Europe, with some butterflies traveling south over Sahara in Africa and others to Ethiopia and Eritrea, then migrating northwards to the north. Mediterranean Sea.
Butterflies with a painted woman can travel quickly. "They can move cars at 25 miles per hour," said Shapiro.
And they are good at generating body heat through a muscle cage, which allows them to fly at lower temperatures. The painted ladies are the highest billers seen in all butterflies at about 22,000 feet, he said.
The scale of the northern migrants is often associated with the flora of wildflowers in the wild, as heavy rainfall contributes to the growth of hospitality plants, Shapiro said. Anza-Borrego Desert State Park said this week that many parts of the park exhibited many wild flowers.
Little birds are catching the butterflies on the shield, with most of them eating if they are cold or slow-flying or in ponds on the ground, e. And there are numbers beside the butterflies. “The birds that eat butterflies get very quickly and quickly, 'he said.
"Yesterday, March 11th was a anniversary when Davis reached 2005," said Shapiro. "I thought it would be very tight when they reached this same date but it didn't happen."