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Fly Hackle

Irideus~ Glister Leech & Soft Hackle Peacock Zug Flies~ $8.99

Brown Black Rooster Hackle Fly Tying Feathers 15” x 4” $4.95

The Origin Of Spiders

The order Araneae (spiders) is traditionally divided into three divisions:
1) Mesothelae (also known as the Liphistomorpha). These normally have a narrow sternum and always have 4 pairs of spinnerets
2) Mygalomorphae (tarantulas and relatives – also called the Orthognatha or the Theraphosomorphae) . These all have downward pointing fangs (called chelicerae) and can live for up to 25 years
3) Araneomorphae (the rest of the spider family – also known as the Labidognatha).These are distinguished by their fangs that point diagonally forward and cross in a piching action.

However it is possible the Mesothelea are really a part of the Mygalomorphae, this would leave us with only two groups; the primitive Tarantula types (Mygalomorphae) and the more advanced Aranaeid type (Araneomorphae).

If you have got this far I am very proud of you, that was an awful lot of very big words, it doesn’t matter if you can not pronounce them all. The important thing is that we have two groups of spiders, one of which we call ‘primitive’ and the other ‘advanced’.

The ‘primitve’ Orthognathans have chelicera (fangs) that flex up and down, i.e. they bite wholly vertically, while the ‘advanced’ Labidognathans have chelicera that flex sideways i.e. they bite at least partly, horizontally or down and inwards at the same time.

There are about 1,000 species in the Mygalomorphae, (only one in the UK) and over 36,500 species in the Araneomorphae of which more than 600 can be found in the UK. But what do these terms ‘primitve’ and ‘advanced’ mean? It is all to do with our perception of time as running in a line, with a direction along which evolution is moving. Primitive characteristics evolve earlier and are shared by more species within a given breed.

Spiders don’t seem to fossilise well, we have very few fossils from the Mesozoic era, 230 to 70 million years ago (MYA), and even less from the Paleozoic, 600 to 230 MYA. In the more recent records of the Cenozoic we have much better fossilisation due to the growing success of resinous trees which allowed for insects and spiders to be trapped in amber.

By then however most of the spiders closely resemble modern species. We have about 300 species of spiders from about 40 MYA. Three hundred is a very small sample of the thousands of species that Must Have lived then, but this is the best record we have. Moving closer to the present we have only about 100 species from only 20 MYA.

It is suspected by scientists that the first spiders used silk only to wrap eggs and for sperm-webs. The next step is believed to have been the lining of a burrow and the laying out of trip-lines as described below.

We are pretty certain however that spiders were spinning webs to catch insects at least 160 MYA, or during the age of the Dinosaurs. Spiders very similar to modern orb-web weavers existed 100 MYA and this is one of the reasons that some experts think that the orb-web was one of the earliest webs constructed and that many of the other sheet and dome webs made by modern spiders are derived from this.

The first spider probably evolved from a crustacean like ancestor called a Eurypterid during the early Devonian era of history almost 400 MYA. One of the most ancient spider fossils we know of is Paleocteniza crassipes which walked and hunted on the earth in the late Devonian. We would call this the most primitive spider of all, and all its characteristics would be described as primitive characteristics.

Here ‘primitive’ just means those that came or were first. Paleocteniza crassipes had 8 legs and chelicera (fangs) that flexed vertically so these two characteristics are ‘primitive’ characteristics. All spiders still have 8 legs so we cannot use that to help us understand spider evolution.

However about 250 MYA a new type of spider evolved that had chelicera that were slightly twisted around and that are now flexed partly sideways, because this characteristic evolved out of the first one we call it an ‘advanced’ characteristic. Here we have only two steps, if we had three or more steps then the middle ones would be called ‘intermediate’.

Unfortunately in human society the word primitive is often used as an insult and means something that is no good, while advanced means good, in evolution there is no good or bad except from a personal point of view, all of life is good. In fact many people would prefer a ‘primitive’ spider like a Tarantula to a more advanced spider like a Black Widow.

You will also occasionally hear or read the terms ‘highly evolved’ and ‘more evolved’ these really refer to the number of observed evolutionary steps that can be discerned in the creatures’ evolutionary history.

Again being highly evolved is not necessarily good, many of humanity’s most obnoxious parasites are more ‘highly evolved’ in terms of evolutionary steps, than humanity itself.

It is fun though to observe how characteristics and traits have evolved in animals. Let’s take a closer look at the use by spiders of silk in hunting. First I have to point out that though we have divided the spiders into two (or three) main groups in terms of their taxonomic development we have been left with over 36,500 species in one of our groups.

There are, however, two ways we can divide this large group up that will facilitate learning. One is two divide them into active hunters and passive hunters, or in other words those who use silk to catch, or help them catch their prey and those who don’t.

It may surprise you to know that many spiders do not use a silk snare at all. They include all the Wolf spiders (2,261 species), Crab spiders (2,024), Mouse spiders (1,957) and Jumping spiders (4,869). Jumping spiders are the family Salticidae, which with 4,869 members is the largest single family of spiders in the world.

The second division is based on how spiders spin their webs, some spiders use sticky silk to trap their prey in their web, and some use a mass of very fine tangles a bit like Velcro (or a tangled fishing line), more correctly this is called ‘hackle band’.

This second type of spider has a special organ called a ‘cribellum’ to help them spin this sort of web, and they are therefore, called ‘cribellate’ spiders, the rest are referred to as ‘ecribellate’.

Now the interesting thing is that the lineages of these two groups of spiders separated a long time ago and in looking at the sort of webs spiders spin we can see that the same sort of geometrical patterns have been developed by both types of spider independently.

Amongst the more traditional webs, those that simply wallpaper a retreat hole and then have a few extended lines stretched out in front of the retreat, are considered to be the most basic.

The trip-lines in front of the retreat do not catch prey items, but do let the spider hiding in its hole that there is something out there. It can then check this out, rushing out to catch it if it seems to be edible. Tarantulas and many other spiders such as the European Segestria Florentina live in a silk lined holes like this. An unusual development of this basic plan is seen in the purse web spiders (family Atypidae) such as Atypus Affinis.

This European spider lives in a hole in the ground, like the simpler spiders mentioned above it lines its hole with web. However it also builds a sealed tube, often called a finger that extends from the apex of the hole some distance.

When a fly lands on this web tube the spider runs out along the inside of it and bites the fly through the web. The fly once bitten is pulled in through the web and taken into the burrow where it is eaten. After its meal the spider repairs the rip in the web where the fly was dragged through it.

The house spider (Tegenaria Domestica) hunts in a similar manner except that instead of a few trip lines she has a whole messy sheet of web in front of her door, any insect that lands on this is regarded as dinner.

From these humble beginnings there have developed many more interesting uses of silk ranging from the horizontal sheet and tangle webs used by many different spiders through dome webs of the Linyphiidae that you can see in any wood, garden or grassland and on to the familiar Orb-web.

Interestingly scientists used to think that the evolution of ecribellate spider webs could be traced from the simple trip lines of Segestria to the sheet webs of spiders such as Lithyphantes through webs of growing geometric perfection such as those of Linyphia and then Cyrtophora to end in the orb-webs of Araneus.

Now however it seems certain that the orb web may have developed first and that the webs of Cyrtophora, and possibly those of Linyphia as well, may be derived from it rather than precursors to it.

On the cribellate side of things the sequence of development that was worked out 50 years or more ago seems more reasonable. Here we have a similar five stage development starting with the simple hole retreat and a few trip lines (though these may have some hackle band on them) of Fillistata.

Stage two is recognised by the expansion of the trip lines into a catching plane as in Eresus and stage three by the abandonment of the stone or wood hole retreat as seen in Dictyna. This allows the spider to occupy more parts of the environment, the retreat is now built at the edge of the web.

In stage four (Sybota) we see the web develop a centric pattern (meaning it has a definite centre with catching threads and support threads).

Finally in spiders like Uloborus we reach stage five where we see a web that is basically an orb-web except that it has hackle band instead of sticky web. The fact that the basic geometric shape of the orb-web with its external boundary lines, its radial supports and its spiral of catching threads winding out from the hub is seen in both cribellate and ecribellate spiders is interesting.

It can be interpreted in two different ways, either it is an example of convergent evolution such as we see in many places in nature where two animals independently evolve the same characteristic simply because it fits the environment best. Or it could support those theorists who believe that the orb-web evolved before the division of the spiders into cribellate and ecribellate.

If this second scenario is the correct one it would mean that all the non orb-web ecribellate spider webs are derived from the orb-web. The answer is unlikely to be found in the fossil record, if spiders tend not to fossilise well then their webs fossilise not at all.

The truth will, I am sure, eventually be sorted out through the use of methods such as protein sampling, DNA sampling and cladistic analysis.

Evolution is not finished, and it certainly didn’t stop for spiders at the orb-web design. Many spiders show modifications of this basic form, many of which are simplifications. The New Guinea spider (Pasilobus ssp.) builds a simple triangular web consisting of only three radii and four sticky crossbars.

This works because if an insect flying past brushes against one of these strands it breaks off from the outer radius and hangs down. In doing so the free end swings around and sticks to the insect which is then reeled in from the still attached end by the spider.

There are also fascinating examples like the Net Casting Spider (Dinopis Guatemalensis) which makes a net of silk web and then hangs upside down waiting for something to pass so that it can drop its net on to it.

Or the Bolas Spiders like the American Mastophora ssp. which emit a pheromone that mimics the sex attractant used by certain moths of the genus Spodoptera (Army Worms).

Males that are attracted to the false pheromone are then caught by the spider using a swinging strand of silk with a sticky blob on the end. The moth gets caught in this, the original bolas, and then the spider hauls it in.

About the Author

Nikki Fox, like over 50% of the worlds population suffers from arachnophobia.
She has created a website to help fellow sufferers to deal with the fear of spiders and spider prevention in the home. Please visit www.spiderpanic.com

Winter Time Is Midge Time When Fly Fishing For Trout

Let’s face it, we dream in Technicolor of size 10 Green Drake
hatches or Hexagenia Limbata as big as beavers – but the reality
is Winter Time Is Midge Time. Often the only bugs on the frigid
water are so small; they challenge most anglers to consider
LASIK. And as you already know, much of the eating is under the
surface.

At a fly-tying class, I once heard a locally famous fly tier
named Pops quip something along the line of “my second best fly
Tying Material supplier is Hobby Lobby”. This, of course,
assumes that Blue Heron Fly Shop where we were sitting is his
“first best”. This guy is also well known for the quote “it
ain’t no use, if it ain’t chartreuse” but that, as they say, is
another story.

Armed with this nugget of wisdom, I scoured every section of
Hobby Lobby. Eureka! Great little wires for tying “ribs” of
nymphs, wonderful foam sheets for terrestrials, assorted yarn
varieties for ‘buggers, and beads, beads, beads! All this is
available at a fraction of the cost of their fly-shop
counterparts. Bingo!

From this magnificent Wall-O’-Beads, I found some fine little
metal ones in a small pinky-sized cylinder. They came in a
variety of colors like olive, purple, copper, and brown. Many
had fancy names like Brown Iris Metallic Beads (the one I took
home) and numerous others. Perfect. We ARE talking tiny here.
Just the right size to barely squeeze on to barb-less size 20
hooks and be proportionate.

Armed with these at my fly tying station, I began to
experiment. If you have ever collected and looked at tiny water
bugs, you will note their appendages and segmentations are not
distinct unless under a microscope. So, I combined the little
bead heads with many simple body materials trying to find a
simple-to-tie solution. I wanted to approximately match the
hatch from recent trips to the stream. I finally boiled it down
to dyed Goose Biots. I had originally experimented with biots to
tie Prince Nymphs at a much larger scale and certainly a
different application. My favorite biot color is olive, and man,
what a great subtle segmented body biots make. Ultimately, I
designed Duff’s Bead/Biot Midge – perfect for fishing Winter’s
cold waters. More than just this emerger, I developed a powerful
One-Two Punch combination that has proven itself over and over
in many tailraces throughout Texas and Oklahoma.

Though the tiny bead/biot midge is a killer as a dropper below
a larger nymph, the One-Two Punch consists of a dropper below a
similar looking dry. Before I give you the recipe, let me
describe the simplicity of these two flies. The dry fly is:
olive thread, olive biot, and olive/gray hackle on a size twenty
barb-less hook. The dropper, often fished just 6 inches below
the dry, is: olive thread, olive biot, and metallic bead on a
size twenty barb-less hook. Simple, right? It’s really easy to
tie too. But don’t let that make you feel guilty when you when
you catch numerous trout with it.

Duff’s Dry Midge – Olive

Materials –

* Hook: Size 20 dry

* Thread: Olive 8/0

* Body: Goose Biot dyed olive

* Hackle: Olive/Gray sized to match hook gap

* Head: Olive Thread

Technique – Crush barb, put hook in vise, jamb knot thread and
wrap back to bend, tie in point of biot, wrap thread forward,
spiral biot forward leaving segmentation and tie down with half
hitch, tie in single hackle, trim base, wrap hackle and tie off,
whip finish forming head, add cement.

Duff’s Bead/Biot Midge – Olive

Materials –

* Hook: Size 20 dry or scud/nymph

* Thread: Olive 8/0

* Body: Goose Biot dyed olive

* Head: Brown Iris Bead

Technique – Crush barb, place bead head on hook, put hook in
vise, jamb knot thread and wrap back to bend, tie in point of
biot, wrap thread forward, spiral biot forward leaving
segmentation and tie down with half hitch (optional – tie in a
few strands of crystal flash as a wing and clip close), whip
finish behind bead head, add cement.

For those who are not into fly tying but are into fly fishing
Scott has put together an assortment of dry flies and nymphs
that no fly fisherman should be with out. See Duff’s
Ultimate Midge Pack.

Scott is a lead editor and contributor to SouthwestSportsman.co
m, a website dedicated to the enjoyment of the great
American outdoors.

About the Author

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