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What Happened to the
Butterflies? First of all, a little 2007
history. For all we have learned about it, 2007 ended up being a record
year for butterflies and other insects. Some say the best year in 20
years. Typically that's a good thing and a bad thing. The natural world
operates in cycles. Increasing and decreasing cycles. These cycles happen
in many if not all species of insects, birds, animals, etc.
2008 is probably the worst year for butterflies in 20
years. Here you have a boom and a bust. There are several theories and for
sure there are several causes. Unfortunately mankind is so out of touch
with the real world that we just struggle to understand and make theories,
ideas and SWAGS. (Sophisticate Wild Ass Guesses).
I know there was an abundance of butterflies last year.
I know there was an abundance of other insects last year as well. There
was an abundance of butterfly predators, because there was an abundance of
butterflies. It's part of the natural chain of events. I believe that part
of the fact this year is so bad, is because last year was so good. Cycles
of boom and bust....
I have heard that it is too dry this year, but in our
county, the rainfall is still above the average for Jan., Feb., Mar, &
Apr. I would say that rainfall is not the key for Smith County. I have
heard that due to the abundance last year, the predators of butterflies
(more like caterpillars), decimated the numbers in fall and due to that,
we have a bust year now. I believe that's part of the equation. However, I
saw many butterflies very early in the year. In looking at my records, I
see good numbers of many species in March and Large numbers in April. This
leads me to believe that many pupae had to make it till spring, for there
to be so many early butterflies.
Around April 20th. the numbers drastically decreased and
by the first of May it seemed that butterflies never existed. None could
be found. Still we only find handfuls here and there. It has affected all
species, not just a few. What could decimate the numbers so quickly, when
it was looking to be a good year?
Here's my take and it's only conjecture formed by the
thoughts of a total amateur. It's not substantiated, except in my own
convoluted logic, but it's my only answer. Early butterflies in Feb., Mar.
& early Apr., must have needed to find host plants, to lay eggs. The
species has to reproduce, since longevity for most butterflies is very
short. I see that in the time period of Feb.-Mar. that plants bloomed,
host plants grew, things seemed to come early, too early this year....
Then there were two freezes, one of which was a hard freeze and lasted for
a day or two. Afterwards, the flowers died. The host plants died. Growth
halted and everything had to start all over again. The plants did that,
they grew again and wild flowers are all over, host plants are out, but no
butterflies...... I believe that the "first batches" of butterflies
never succeeded in continuing the species, because of the
freezes, which would have killed off the new eggs and new caterpillars.
The death of the plants, from the freezes would kill off the caterpillars
and the remaining butterflies never were around or able to come back with
more eggs. A few survived, just a few and now we have a bust year.
Those are my thoughts on what happened, but I am only a
layman, not an expert. I also believe that it will take 10-20 years to
ever see a boom year again and with what mankind is doing in this area, it
may well never happen, because of the tremendous loss of habitat.....
In other words, for myself, I think I was very lucky to have experienced
last year's record numbers, because I will never see that again, in my
lifetime... I also believe that there may be some species that will not
return to this area at all. It is possible that the species who were
already "on the edge" in this area, may be gone permanently...
Remember also, it's all a chain of events. This has and
will affect other insects, birds, etc. The events will progress over the
next couple of years, most likely, with reduced numbers of birds in our
area. I already see reduced numbers of moths, bees, grasshoppers and other
insects. It will absolutely have an affect throughout the food chain!
Justin 6/26/2008 |