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May 16, 2003

The Black Flies are quiet today.

[Summarized from Full link at end of this item.]

"New Hampshire is home to approximately 40 species of black flies. Of these species, only 4 or 5 are considered to be significant human biters or annoying. In some cases, black flies may not bite but are extremely annoying as they swarm about the head or body. Only the females bite and fortunately most species feed on birds or other animals...

"Black fly species in New Hampshire exhibit two types of life cycles. One type overwinters stage in the egg stage. The eggs remain submerged in streams over the winter and hatch in spring when water temperatures reach about 40 to 50F... [The second appear] in early spring when water temperatures reach about 37 to 38F...

"Black flies are active only during the day. They do not bite at night. Activity peaks tend to occur around 9:00 to 11:00 AM and again from 4:00 to 7:00 in the late afternoon and early evening, or until the suns falls below the horizon. They tend to be most active on humid, cloudy days and just before storms.

"Proper clothing offers good protection against black fly bites... Light colors such as orange, yellow and light blue are less attractive to black flies than dark ones such as green, brown and red."

Posted by jghiii at May 16, 2003 04:42 PM
Posted by: tom duffy on May 17, 2003 11:26 PM

Extreme heat kills the blackflies! they stop hatching, I guess. Each year when we have a heat wave in blackfkt season, the numbers fall off dramatically, whereas cool weather keep them coming. this coming week we could hit two 80 degree days. Maybe this will work!

Posted by: Berkely CA on May 19, 2003 10:51 PM

I have my windows open all the time -- every day. And the only thing I have to deal with is spiders and ants.

But there are lots of ants. Huge amounts of them. They just don't give up.

Posted by: Jack on May 20, 2003 08:34 AM

Ice. Pestilence. Humidity.

Aren't those three of the horsemen of the apocalypse?

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