Chemically Protected Insects | ||
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Green Stink Bug, Palomena prasina. Has paired stink glands in the thorax. |
Caterpillar of a Swallowtail Butterfly, Papilio sp.1 With everted yellowish stink glands (osmeteria) located just behind the head. |
Malachid Beetle, Malachius bipustulatus.1 Has red eversible stink glands (osmeteria) on either side of the thorax and abdomen. |
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Larvae of the Lily Beetle, Lilioceris lilii. Covered with their own slimy, black excreta. |
Bloody-nosed Beetle, Timarcha tenebricosa. Expelling a red defensive fluid from its mouth (known as 'reflex bleeding'). |
Larva of the Pine Ladybird, Exochomus 4-pustulatus. Expelling droplets of yellow defensive fluid from its abdominal segment joints (another form of 'reflex bleeding'). |
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Darkling Beetle, Eleodes suturalis. Defensive stance (left) and the spray pattern of its defensive secretion (right: as a yellow reaction on the purple indicator paper) in response to having a middle leg pinched with tweezers. |
Devil's Coach-horse Beetle, Ocypus olens.1 Defensive stance whilst expelling an irritant fluid from whitish glands at the abdomen tip. |
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Bombardier Beetle, Brachinus sp.2 Defensive spray in response to having a front leg pinched with tweezers. |
Caterpillar of the Io Moth, Automeris io.1 With body hairs containing a painful irritant. |
Wasp (abdomen tip), Vespidae sp.1 Sting with a droplet of poison at the tip. |
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Aphid or Greenfly, Aphididae sp.1 With droplets of sticky defensive fluid on its cornicles. |
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| Photo Credits: 1CCA ShareAlike or GNU Free Documentation License; 2Phi Sigma Biology Honors Society (http://asups.ups.edu/) | ||
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