Large milkweed bugs (Oncopeltus fasciatus) in Wood Dale, Illinois, USA
by Olaf Nelson
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10/13/23: Large Milkweed Bug (Oncopeltus fasciatus)
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Adult Lygaeus kalmii (bottom) with nymph Oncopeltus fasciatus (top) on Asclepias / Adult Small Milkweed Bug (bottom) with nymph Large Milkweed Bug (top) on Milkweed at the Sarah P. Duke Gardens at Duke University in Durham, NC
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The large milkweed bug (Oncopeltus fasciatus) and the milkweed aphid (Aphis nerii) can also incorporate cardenolides into their bodies and become toxic themselves (Figure 23.13).
"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.
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A hike in the Cheat River Canyon on a hazy, mid-summer day brings a great many rewards, both large and small.
From top: Fractured and pitted sandstone gives testimony to the canyon's ancient struggle with the elements; black cohosh (Actaea racemosa or Cimicifuga racemosa), whose towering flower spikes stalk the old woods like magical beings; the colorful rock harlequin (Corydalis sempervirens), an endangered fumitory that haunts the canyon's rocky outcrops; pinesap (Monotropa hypopitys), a parasitic plant closely related to Indian pipe; spotted St. John's wort (Hypericum punctatum), which is distinguished from the invasive St John's wort (Hypericum perforatum) by the numerous black dots on its flowers and leaves; downy rattlesnake plantain (Goodyera pubescens), a shade-tolerant terrestrial orchid that favors oak-hickory woods; shrubby St. John's wort (Hypericum prolificum), a mounding, deciduous shrub of open, sandy woods; orange-fringed orchid (Platanthera ciliaris), a stunning late summer beauty of Appalachia's moist meadows and open woods; a hummingbird clearwing moth (Hemaris thysbe) visiting a late-blooming milkweed; a silvery checkerspot (Chlosyne nycteis) drinking up the nectar of a butterfly milkweed (Asclepias tuberosa); an American green crab spider (Misumessus oblongus) stalking a black-eyed Susan for its next meal; a large milkweed bug (Oncopeltus fasciatus) being perfectly beautiful on a lazy summer day; and last but not least, a hulking patch of eastern Jack-0'-lanterns (Omphalotus illudens), which contrary to what field guides say have never glowed in the dark for me (I love the toxic little beauties nonetheless).
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A triumvirate of red milkweed insects:
Large Milkweed Bug (Oncopeltus fasciatus)
Red Milkweed Beetle (Tetraopes tetrophthalmus)
Swamp Milkweed Leaf Beetle (Labidomera clivicollis)
June 2, 2022
Southeastern Pennsylvania
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Large Milkweed Bug (adults and nymphs), Oncopeltus fasciatus
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large milkweed bug, oncopeltus fasciatus
photo credit
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Large Milkweed Bugs (Oncopeltus fasciatus)
10/7/22
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Oncopeltus fasciatus, known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae. It is distributed throughout North America. It ranges from Central America through Mexico and the Caribbean to southern areas in Canada. Costa Rica represents this insects southern limit. It inhabits disturbed areas, roadsides and open pastures. Due to this widespread geographic distribution this insect exhibits varying life history trade-offs depending on the population location. (at Arlington, Virginia) https://www.instagram.com/p/CkHrlE_omTipROyfv4CwzxUdvN9Gf6Ydb5d2zU0/?igshid=NGJjMDIxMWI=
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two milkweed bugs showing natural color variation; one is mostly yellow, and the other is a bright orange
Oncopeltus fasciatus
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Saturday, April 23, 2022 - Arizona
Oncopeltus Fasciatus, the Large Milkweed bug
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Large milkweed bug (Oncopeltus fasciatus)
Photo by Marlin Harms
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Milkweed bug nymphs (Oncopeltus fasciatus) on immature seed pods of common milkweed (Asclepias syriaca)
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