10 min

Western Monarch Butterfly Population 2015 Grow Milkweed Plants

    • Nature

Featured content:

Western monarch population count is 271,924 butterflies.
Data collected at 187 overwintering locations from Mendocino county to San Diego county (most ever visited in one year).
New overwintering sites located in Alameda and Marin Counties.
Monarch breakup (think valentines day) marks start of spring migration.

Featured content:

Western monarch population count is 271,924 butterflies.
Data collected at 187 overwintering locations from Mendocino county to San Diego county (most ever visited in one year).
New overwintering sites located in Alameda and Marin Counties.
Monarch breakup (think valentines day) marks start of spring migration.

10 min

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