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Monarch butterflies spotted migrating through Milwaukee
October 20, 2026
butterflies were observed on 2026-10-14 at two locations in the Milwaukee area during their fall migration. The species is proposed for federal Threatened status, adding regulatory weight to sightings that document the migratory population passing through the Lake Michigan Plain during peak southbound movement in mid-October.
Common buckthorn berries ripen around Mequon
October 20, 2026
was recorded at Minooka Park and W Huntington Dr in Mequon on 2026-10-18, continuing its presence through mid-October as fruit enters peak ripeness when birds consume and disperse the black berries. The introduced species persists widely distributed across the Milwaukee region during this critical dispersal window.
New England aster still blooming at Minooka Park
October 20, 2026
New England aster was recorded in flower at Minooka Park on 2026-10-18, well into mid-October across multiple Milwaukee area locations. This native perennial normally peaks bloom in early October; its extended flowering may be sustained by mean temperatures 3.3°F above normal for highs and 5.6°F above normal for lows over the past month, which lengthens the fall season.
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