Crane Fly Interlude

When ProfessorRoush spots an unusual insect in the garden, some chitinous-shelled life form beyond his ken, he takes note of it.  When it's on a rose plant, and particularly on a rose bloom, he moves into panic mode (or as close to it as he ever gets), and he looks it up as soon as possible. 

This week, in the garden, the unusual insect was this six legged, winged creepy-crawler that I believe I've correctly identified as the adult form of a "crane fly," Family Tipulidae,  known colloquially in England as a "daddy long-legs," or in other quarters, as a "mosquito hawk."  I first spied him on a bloom of 'Snow Pavement' as I was searching for the first appearance of Japanese Beetles, and then saw a second one nearby on the foliage of "Foxi Pavement."   A quick check of Internet sources tells me that it has no relation to the eight-legged monsters that I knew as granddaddy long-legs that infested the tents of my childhood, seemingly reconstituting themselves inside tents stored for decades between uses.  I also found that its diet does NOT include mosquitoes.  In fact the adults, which only live to procreate during a life-cycle span of 2 weeks, normally don't eat during that period at all.  They can reportedly copulate for up to 2 hours (who actually watches and times such things?), which would be pretty neat but would also make me pretty hungry, so unfortunately I'd conclude that the extended pleasure is not worth trading for the stomach cramps.

So what are they and what kind of fresh H-E-double toothpicks are they starting in my garden?  First, I learned quickly that these little morsels won't damage the rose blooms, much to my relief since I have few left to damage.  It may be the larvae, known as leatherjackets, that I have to worry about, if any.  The larvae live in the top layers of the soil and feed primarily on decaying organic matter, although they sometimes also feed on the roots, root hairs, and crowns of crops, stunting growth or killing the plants.  Bloody heck, in 1935 the little buggers invaded Lord's Cricket Ground in London, caused dead patches on the wicket, and the pitch exhibited unusual spin through the season.  What a balls up!

I've decided to leave them alone, as crane flies are also likely important in the soil ecosystem, improving microbial activity and recycling oganic material and because they serve as prey for other predatory insects and spiders, perhaps providing a food source to keep them alive long enough to consume other, more rose-harmful insects later.  I don't think I can blame them for the loss of so many roses to Rose Rosette Disease, and they're so much more dainty and delicate than the blundering Japanese Beetles I was expecting.  I'll consider the crane flies as my guests until they start tracking up the carpet or leaving the toilets unflushed.