Tag Archive | Spiders

The jumper that’s close to home

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This lovely jumping spider is a common sight on walls around the Vancouver area: meet Platycryptus californicus, a member of the Marpissinae subfamily of Salticidae.  If you live in Eastern North America, another PlatycryptusP. undatus is also common.

At first glance, P. californicus seems a wee bit boring. They are overall grey and drab, and hang out on grey drab walls. When shot up close on white, however, these little salticids reveal their beauty. I found this one yesterday on a wall in my back yard, and a couple days ago one was in my living room. This is truly one jumper that has adapted well to the urban habitat.

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The greyness and drabness help these little jumpers blend in to rocks and now concrete.

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The drabness is not complete however, as there are rufous hairs scattered around, particularly near the eyes and on the sides of the abdomen. A bold white stripe is evident on the lower portion of the prosoma, just above the legs.

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Unlike some other species, these jumpers seem to pause every once in a while, which makes photography easier. Check out those cute little eyelashes!

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They seem to move their palps quite a bit (perhaps to cover their hideous fangs, like Dracula with his cape?)

Weekend Expedition 26: Biking out to Iona

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Trying my hand at bike-borne photography, this is my shot of a jet coming in to YVR. Note the Guaranteed Terrorist Proof® Fence!

This weekend Expedition, my dad and I paid a visit to Iona Beach, a place that has been very productive in the past.  We took our bikes out there, the better to enjoy the scorching sun and cloudless skies…

Like many hot and dry days, this trip was not as productive as it might have been, with many critters deep in shelter, and those that remain active remaining VERY active. Nonetheless, we did turn up a few cool animals, and I hope you enjoy the pics!

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The unhappy remains of a green lacewing?

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This little garter snake was under a log near the beach.

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A Philanthus gibbosus beewolf, so called because they feed their young bees.

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A Damsel Bug (Nabidae) haunts the under-log world.

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There were few jumpers evident this time, which was a bit of a disappointment, but I did find this one female Habronattus.

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A Hobo Spider (Tegenaria agrestis) is actually a pretty elegant looking thing!

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There were many nymphal grasshoppers around, or as I like to call them, spider food!

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A female Wolf Spider with a nest and an egg sac!

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Check out the markings on this Hobo!

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The dreaded Dysdera crocata, or Woodlouse Hinter.

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A tentful of caterpillars on alder.

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I wish I knew my grasshopper well enough to even say what genus this is in…

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The buttonflowers can be productive for Hymenoptera.

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Bembix Sand Wasp. Check out its crazy labrum!

All in all, the Expedition was not terribly fruitful. In the future I need to get out closer to dawn so as to take advantage of the less-active insects and better light…I made up for it Sunday with a bit of grant-writing at home and some prep for Cheapskate Tuesday.

Emergence Day!

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Remember those black widow egg sacs we collected a few weeks ago? Well, the spiderlings have hatched, moulted once, and are now emerging from their egg sacs!

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Here is what an egg sac looks like when it is ready.

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And here, with light penetrating the silk, you can see the spiderlings inside:

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A spiderling peeking out.

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And squirming free.

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Done!

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Here, the baby spiders socialize at the playground. They are best of friends at this stage…
Just kidding! They cannibalize each other like zombies!

In other baby spider news, at the apartment, the cellar spiders have hatched, and are spending some time adjacent to mom in the same corner where they were brooded.IMG_0010 IMG_0018

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Cheapskate Tuesday 21: Sitting on black

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Seeing as how last week’s Sitting on White was fun to do, and inspired by this great post by Alex Wild, I decided to shoot some jumpers sitting on black.

To do this, I simply spray painted a sheet of window glass black, and used the unsprayed side as a stage. The lighting was much more simple than Alex’s, just  single diffused speedlight overhead. All shots required a good deal of “healing” to remove dust, but in general they came out OK. The better method would be to get a thick piece of glass as Alex described, but I do not have any such on hand, and if I had tried this with the glass suspended, i would get ugly double reflections. Anyway, I hope you enjoy the pics, and get inspired to try it yourself!

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I think this guy could see his reflection!

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By the way, when I tried to bring in a snooted rim-light, this is what happened. Messy, but kind of cool!

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Weekend Expedition 21: A spider hunt at Iona Beach

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This weekend expedition, I put out the call for our lab members to join me in a trip to Iona Beach, which is just bustling this time of year with all kinds of wonderful creatures, especially some wonderful spiders. I was joined by Catherine Scott, Samantha Vibert, Matt Holl and Nathan Derstine from our lab, and the newly-minted Dr. Gwylim Blackburn of UBC. We were heavily loaded with spider experts, as Catherine studies the western black widow, Sam has studied the hobo spider, and Gwylim is an expert in salticid behaviour and evolution. Luckily for us, Iona Beach was a field site for both Samantha and Gwylim, so they knew the good spots to find the best spiders.

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A chrysidid seeks bee nests to parasitize

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A male Yellow-headed Blackbird. This population at Iona Beach is a very disjunct coastal population of a normally Interior bird.

 

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A male Salticus scenicus (Zebra Jumper). Look at his amazing chelicerae!

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Sam enjoys the Yellow-headed Blackbird

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We checked out the progress on the new Wild Research banding hut.

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A male Tree Swallow watches his mate’s nest box.

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The female peeks out.

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Gwylim handles a newly-shed garter snake

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So bright!

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A male Habronattus americanus traverses a log.

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A large female Trochosa wolf spider hides under a log.

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A female Hobo Spider (Tegenaria agrestis) under a log at the beach.

 

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A very large female Habronattus americanus was unimpressed with our match making (we tried to bring a male in to see courtship).

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The male Habronattus americanus, resplendent with his bright colouration.

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This jumper Matt found is is Habronattus hirsutus.

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A female Phidippus johnsoni looks out from her egg sac.

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Gwillim and Catherine searching for Habronattus ophrys.

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Nathan scans the ground carefully. H. ophrys is very elusive!

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A beautiful Philodromid (running crab spider) under an aster.

At the end of the day, I did some studio shots with the Habronattus ophrys and the Habronattus hirsutus, as the first one at least has very poor photo documentation.

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Habronattus hirsutus

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Habronattus hirsutus

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Habronattus ophrys

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Habronattus ophrys

Weekend Expedition 19: Black Widow collecting at Island View Beach

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This Weekend Expedition was an important working trip, to collect wild stock for Catherine’s western black widow colony. Catherine studies the sexual communication of these beautiful spiders, and requires wild stock to work on. The purpose of this trip was to collect adult females, as well as egg sacs to give the annual boost that her colony requires. We set out Sunday morning to Island View Beach on the Saanich Peninsula of Vancouver Island to turn over logs and search for a hidden treasure of Latrodectus hesperus.

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On the ferry ride over, Catherine begrudgingly shared her breakfast with some gulls.

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And became a big star!

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Providing some close up views of gulls flying over water!

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Island View Beach

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Catherine explains the double pocket technique: load one pocket with empty vials, and transfer to the other as you collect the spiders.

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Jeff and Chloe search a log

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Devin traversed the dunes.

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A rare overwintered male black widow. It is darker than ones reared in the lab.

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A not-yet-adult female black widow.

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Black widows were not the only spiders we found of course. Here is a female hobo spider with her egg sac.

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A crab spider waits out the rain under a log

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We also saw many Dysdera crocata, the Woodlouse Hunter

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which are well-endowed with huge fangs, an adaptation to defeat their well-armoured prey.

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A grub of what I presume is Polyphylla decemlineta, the 10-lined June beetle

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an Enormous Banana Slug!

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Termites, walking in a line. These are likely Reticulotermes hesperus, the western drywood termite. Pay attention Entomology 317 students! Driftwood filled beaches!

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More social insect action!

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A beautiful Carabid

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Lunch on the beach in the rain

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A very short collection trip comes to an end.

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Posing with the booty!

Weekend Expedition Plans: Island View Beach spider collection!

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Black widow with egg sac under a log.

I am headed back to the smog-filled urban sprawl that is Vancouver… But just for 1 night. I come back to the Island Sunday for a quick day trip to collect Black Widows at Island View Beach on Sunday. Here is a shot of last year’s collection trip.