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Oct 1, 2013 8:55 PM by KSBY News

Monarch butterfly population declines

Monarch butterfly migration season is here. This means butterflies will travel hundreds of miles to groves like the one we have in Pismo Beach.

But this year, entomologists say the monarch butterfly population is on the decline.

The reasons include pesticides, deforestation, and a decrease in milkweed. The weeds are essential for butterfly reproduction.

"We had 28,000 butterflies last year and half of them were female, and they all have 100 eggs," said Auburn Atkins of the Pismo Beach Butterfly Grove. "You couldn't get enough plants here for them to survive. They need to leave here."

Local experts say it's too early to know if the Pismo Beach Butterfly Grove will see fewer butterflies this year, since they just started to arrive.

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