Monday, September 29, 2008

Red is for danger

Milkweed bugs gather in a large multi-instar group, their bright coloring a warning to predators that they are poisonous. I don't know what the large brown bug under the cross-beam is, though.
(selecting the image will enlarge it)
milkweed bugs

milkweed bugs

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2 Comments:

At 9:51 AM, September 29, 2008 Blogger Wishydig had this to say...

up in north dakota they call these box elder bugs. at least the 'older' looking ones with darker coloring and the red appearing as stripes. the outside of a house might be crawling with them on a bad year -- patches the size of a door, blackened with the annoying creepers.

they were pretty much harmless but occasionally you'd feel a bite on the back of your neck or some other sensitive area where a bug had enough time to start some trouble.

 
At 8:33 PM, September 29, 2008 Blogger The Ridger, FCD had this to say...

The black ones are the adults; the others are younger stages (instars) of maturity. Milkweed bugs go through 4 instars, I think.

 

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