Where have all the butterflies gone?

In normal circumstance at this time in my garden with the Lantana blooming, and various other nectar rich flowers around, my patio would look like the butterfly house at Kew Gardens but without the glass roof.  I would have swallowtails, skippers, fritilliaries, you name it.  This year nothing.  I have seen perhaps one Tiger Swallowtail, and one Black Swallowtail.  Today there were a couple of Silver Spotted Skippers out there feeding on the Milk Vine and the Pentas.

SONY DSC  It is Sulfer season so a couple of Sulfers were out on the Mexican Sunflower

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But other than that?  Nothing.  I am beginning to think that while I plant specifically to attract butterflies the fact that because I do not use any type of pesticide my garden contains a lot of butterfly predators that they are avoiding my yard as a matter of survival.

To begin with I have a large population of dragonflies thanks to my small working pond where the adults can lay eggs and the naiads can thrive.  Also as I have said before I have a healthy population of Garden Spiders and more recently Golden Orb Weavers, as well as a healthy population of Preying Mantids.  The spiders tend to build their webs where there is a constant supply of prey, in that case it tends to be in and around my flower beds where the butterflies are more likely to fly into their webs.  But the question remains, does that account for the lack of butterflies in my garden or is there something else afoot?

To be sure, my predators take advantage of the all you can eat buffet aspect of my landscape, case in point, this young lady munching on a moth that was visiting the milk vine and obviously didn’t see the heavily camouflaged hunter waiting for her.

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Even one of the dragonflies fell pray to a garden spider web.

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Although I am happy to report that after taking that photo I noticed that the dragonfly was not dead, but was simply trapped in the web and I managed to unstick him and he flew away unscathed.  At what point though do we intervene?  At what point do I make the decision that there are simply too many predators in my garden to enable my butterflies to survive?

This is the first year that I have not had a single Black Swallowtail caterpillar in my garden.  I purposely plant Bronze Fennel as well as copious amounts of parsley and dill in order to feed them, and yet this year the parsley, dill and fennel have gone uneaten.  Unheard of in my garden.

Has anyone else noticed a severe butterfly shortage this year or is it just me?  I know that there is a crisis when it comes to bees but is there perhaps another crisis which involves our prettier pollinators that is not being so extensively reported?

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