14th June – RSPB Strumpshaw
Fen
It was
a windy day at RSPB Strumpshaw Fen yesterday, far too windy for swallowtails,
dragonflies and the like. In fact it seemed too windy and uncomfortable for
just about anything with wings; the skies of the Fen being uncharacteristically
empty. The occasional marsh harrier battling the stiff westerly breeze, the odd
tern and gull and in the latter part of the morning numbers of swifts hawking a
hatch of some small emergent insects. But that was all. Nothing else other than
grey clouds sailing briskly by and waves of wind tossed reeds rippling as they
ebbed and flowed at the mercy of the air currents. Predictably human visitors
were thin on the ground unlike last week when I am assured the Visitor Centre
was assaulted by literal swarms of people hoping to catch a glimpse of our
special butterfly. Today, instead of a torrent a trickle, but all are welcome and all enthusiastic and
hopeful.
|
Always Something to see - Goldspot Moth |
|
Mating Woundwort Shieldbugs |
|
Mullein Moth Caterpillar |
After
my shift I trickled through the water meadows myself, hoping to catch sight of
another iconic insect that is pretty much only found in this county. Norfolk
hawker dragonflies thrive where water soldier plants do well. The plants are
very sensitive to eutrophication, so need undisturbed clean, clear water to
grow. Happily reserves such as Strumpshaw provide an ideal network of ditches
and drainage dykes where this strange aquatic spike ball can live. Contrary to
my expectations there were a small number of dragonflies on the wing, zipping
about very low over the water to minimise exposure to the strong breezes still
whipping mercilessly across the open fields sending the carpet of ragged robin,
cotton grass and orchids tossing as on a raging sea.
|
The Water Meadows |
|
Water Soldier |
|
Common Spotted Orchid |
Before
long the bright green eyes of a Norfolk hawker took my attention and I watched
this insect patrol it’s selected territory investigating every other dragonfly
that approached. In this way it saw off several broad bodied chasers and a
couple of hairy dragonflies before alighting at last upon a reed stem. Wrong
lens, wrong angle but a couple of record shots in the bag. It’s always
fascinating watching these superbly evolved aerial predators, they miss
nothing. If you look closely you will see that their heads with those huge
compound eyes, are always twisting this way and that scrutinising the skies for
rivals or potential mates.
If you look closer still along the untidy margins of
the dykes you may be lucky to see a female laying her eggs in the stems of a
water soldier plant. The Latin name for these Norfolk specialties is Aeshna
isosceles derived from the yellow triangle present on the abdomen. Whatever you
wish to call them, they are, as is with much of Broadland wildlife, quite
special.
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