Archive for the ‘misc’ Category

spider captures a bird

Saturday, September 3rd, 2011
Argiope spider eats bird
Photo by Ann Harwell. Argiope spider consumes a sparrow near Wendell, NC, August 2011.

A fellow North Carolinian recently posted this amazing photo on our Facebook page (thanks for sharing!) of an Argiope spider that caught a sparrow, and I have to admit that I was quite surprised. I mean there certainly are known bird predators classified within Araneae, but local ones?! Sure, why not. We’ve already seen other local arthropods consume birds, like praying mantids, and this video shows an Argiope in Texas that caught a barn swallow. I was able to dig out a couple of older accounts of similar incidents, one involving a yellow warbler and another where a goldfinch was captured by an Argiope. This one is by Coale (1912):

In the early part of September my friend, Otto Helwig, while crossing a piece of brush land on the edge of town, flushed a Yellow Warbler, which flew against a big spider-web stretched across a bush, and became entangled with wings spread out against the web. As the bird struggled to free itself, the spider (a large black one with yellow markings) ran down the web and at once began to bind its victim, by running back and forth across its body and wings and weaving its silken strands from side to side, completely tying the bird to the web. At this point Mr. Helwig stepped up, the spider dropped into the bush, the bird was released, soon revived and flew off.

And this one is from Mackay (1929):

…Yarmouth, Cape Cod, Mass., witnessed one morning in August, 1928…

In walking across the fields in Yarmouth and crossing a dyke around the edge of a cranberry bog, his attention was aroused by the disturbed calls of a small bird. He soon located the spot and found a small bird which he called a wild canary (probably an American Goldfinch?) completely immeshed in a spider’s web, which appeared to be about twelve inches in diameter, and placed near the ground between two blueberry bushes.

This spider Mr. J. H. Emerton, the eminent authority on spiders, has identified from the description as being a female Argiope aurantia. After watching a few moments, during which time the ensnared bird’s mate was flitting around and chirping apparently much disturbed, he released the captive bird and removed what he could of the web which encircled it, and holding it in his open palm invited it to fly away, but either through fear or exhaustion it was unable to do so, and in making the attempt fell at his feet among the bushes and disappeared before he was able to recapture it. It is probable that some of the readers of this article may question the possibility of any spider indigenous in the New England States constructing a web of sufficient strength to hold even a very small bird. I coincide in this view – with the exception of this particular spider, Argiope aurantia.

Mr. Emerton has kindly shown me a specimen of a large female of this spider with a yellow and black body and long black legs, whose body is as large as the end of one’s finger. It usually spins its web near the ground between two bushes where there is rather dense undergrowth, leaving only a contracted space between them, with a sort of lane or pocket behind.

Mr. Emerton showed me photographs of such webs in place, and made the suggestion that a small bird on becoming entangled might not have sufficient space to exert its full strength to liberate itself; he also thought it unlikely that the spider would have been able to kill the bird.

References:

  • Coale, H. K. 1912. Dendroica aestiva captured by a spider. The Auk 29 (1): 105.
  • Mackay, G. H. 1929. A spider (Argiope aurantia) and a bird (Astragalinus tristis tristis). The Auk 46 (1): 123-124.

Ticks on a plane

Tuesday, May 10th, 2011

Yesterday, I flew the exhausting, bone-stiffening 10 hour flight from North Carolina to London, England. I’m here to visit the beautiful Natural History Museum to image type specimens of Evaniidae for my graduate work. I was expecting the only trouble I might have was getting through security at the airport with the imaging system I am carrying (there was no trouble!), but sometimes you just can’t plan ahead for certain …peculiar… events while traveling.

I was sitting on the plane next to a young man from London who is studying photojournalism at UNC. While eating our delicious dinner, he suddenly grabs something on his back and utters a few choice expletives under his breath. I watched for a few minutes as he squeezed two fingers together fruitlessly trying to kill the small creature he had found on his back. After a while, he gives up, and I see him throw down a writhing Lone Star Tick into his food! This little arachnid was not among the first things on my list that I expected to see on the plane.

In fact, my fellow traveler did not know that it was a tick he had found. He asked me how I knew it was a tick, and I explained how to identify one and how he might have picked it up. Ticks cling to vegetation with their front legs outstretched, they wait for a sign, such as carbon dioxide, a vibration, or a shadow from a prospective host. Once they are attached to their host, ticks spend several days or weeks feeding on blood before they drop off. He was completely disgusted, even embarrassed (though he shouldn’t have been — he had recently been wandering through a field next to his house), so we switched the conversation around to parasitoid wasps! Truly, this appeared to have disgusted him even further…

Needless to say, the discovery had both of us squirming in our seats for the next few hours!

What makes for a good lab environment?

Wednesday, April 20th, 2011

What makes for a productive lab environment and for a satisfying graduate training experience? That was the subject of a recent group discussion in my lab two weeks ago, which I found incredibly productive (and civil!). What should students expect from their advisers, from postdocs in the lab, and from each other? We spent two weeks synthesizing our thoughts in a shared Google doc, and the result is this statement of mutual expectations – a pact between the students and senior personnel, including the PI, who work in the Deans Lab. We published this statement today and would love to get your feedback. What would you want to see in a set of guidelines?

clichés that drive us batty

Wednesday, April 20th, 2011

Our collective, recent experiences at scientific meetings and local scientific seminars re-ignited a simmering debate: What are our least favorite clichés? You know what I’m writing about – those frequently uttered phrases that rub you the wrong way, that grate on you to the extent that you mostly forget the content of the talk, the proposal, the manuscript, … whatever. Hearing or reading these phrases triggers, in me at least, a long sigh, followed by a feeling of disappointment that we haven’t done a better job of teaching our budding (and experienced!) scientists to express themselves more creatively. My least favorite (most aggravating?):

  • “paint with a broad brush”
  • “low hanging fruit”
  • “I wear many hats …”
  • “drank the kool-aid”
  • any reference to Charles Darwin in one’s introductory statement / paragraph (unless it really is relevant)

Ugh. As vapid as they are, though, they’re not nearly bad as our worst offender: jokes that denigrate grad students. What could be more trite than the (all-too-frequent) acknowledgment that grad students are there to be abused. Need data from FARC-controlled Venezuela? That’s what grad students are for! What’s that? Your research requires data from the vent of an active volcano? Send a grad student! They’re expendable! Ha ha ha! Well, grad students are human beings, and I consider them to be colleagues. Sure, they usually (but not always!) have more flexible schedules than PIs, but that does not give us PIs license to exploit their position as trainees. My charge to those of us who are mentoring the next generation of scientists: stop belittling them.

One other observation emerged that I am not sure I agree with – this phrase rubbed some of us the wrong way:

  • “shedding light on” or “illuminating”

If we strip these words from our lexicon I’m not convinced that we have a perfect replacement. How many other ways can we express that our research will contribute to a continuing synthesis of results? What do you think?

Public Display Revitalization Project and the Artists in Entomology Series

Wednesday, October 20th, 2010

This Friday October 22nd is the public opening for the new public display cases located outside of the Insect Museum.  Everyone is invited to attend the opening starting at  4:00 p.m (in the hallway outside 4302 Gardner Hall, NCSU).

One of the display cases at the North Carolina State Insect Museum is now a curated exhibition space for small paintings, drawings, sound, video and original photographs from artists enthusiastic about insects. The display case is ‘revitalized’ following the artist’s instructions and becomes a short-term public exhibit for the Insect Museum.  Ripley Whiteside is an obvious choice for the first artist in the series because his work deals directly with old collections and giving them new life; reworking the past into the present.  Ripley also worked in Chapel Hill North Carolina until recently so his inspiration comes from our native species and our infrastructure refuse (notice the stamp on the collection box pictured below).  Ripley’s work will be on exhibition until the first of the year and is viewable to the public during normal business hours.

Interview with the artist Ripley Whiteside:

Q: There is a long tradition of natural historians as illustrative artists including John James Audubon, Ernst Haeckel, and many, many others. Who of the characters that are both artist and natural historian do you admire? Are any of them still working?

Ripley: The entire league of naturalist-artists is a major source of inspiration for me. I’m a great admirer of these two, especially Audubon. I got to see the double-elephant folio editions of Birds of America, which rendered me totally awestruck.  William Bartram is especially of interest because of the work he did in the Carolinas. The contemporary take on artists as natural historians is fascinating – these artists do not have the duty of furthering science, and the realm of their art becomes a critical playground. Of many, a few I admire most are Mark Dion, Cornelia Hesse-Honeggar, and Nina Katchadourian. Dion once made a piscatorial exhibit of specimens collected exclusively in Chinatown. Hesse-Honeggar is a scientific illustrator who makes beautiful watercolors of mutated insect specimens she finds in nuclear fallout areas. I’ve only recently come across Katchadourian. She has repaired spider webs with red thread, replaced dainty leaves with even more dainty insect wings, and dressed a rat as a snake and a snake as a rat. She’s got a great website: http://www.ninakatchadourian.com

Q: Did you grow up in a collection atmosphere or visit a lot of museums when you were young? How do you feel modern methods in natural history has changed the ‘feeling’ of collections? Do high-resolution photographs have the same response as ink drawings?

Ripley: I had a formative experience as a boy when my family and I were given a behind-the-scenes tour of the Museum of Natural History in NYC. A friend of my grandmothers showed us around what seemed like miles of hallways, lined floor to ceiling with drawers full of specimens. This immediately struck me as infinitely more interesting than the exhibits on the other side of those walls. Another important visit was to the Museum National d’Histoire Naturelle in Paris.  They’ve got a stuffed dodo.  It is also a site featured prominently in Chris Marker’s La Jetee. Both my parents are collectors of sorts so picking something up and bringing it home feels natural. My dad has assembled a couple of decks of cards entirely from cards he and enlisted friends have found on the street.  My mother is an advocate for artisan groups scattered across the globe and she makes a living trotting around the world collecting interesting and beautiful things.

Q: How do you feel modern methods in natural history has changed the ‘feeling’ of collections?

Ripley: From my not very informed perspective it seems like natural history has fallen victim to the same issues of specialization that are affecting much of the arts and sciences. The retrospectively simplistic system of collecting, observing, and preserving seems to get lost, or maybe at least loses significance. While mountains of data are vastly increasing our knowledge as a whole there is maybe ground lost when it comes to the individual and their relationship to their subject of study. That relationship – the specimen and the scientist- is especially interesting to me.

Q: Do high-resolution photographs have the same response as ink drawings?

Ripley: I think photography and natural history have a strange relationship. Roger Tory Peterson (the author and illustrator of the first modern field guide) said, “A drawing can do much more than a photograph to emphasize the field marks. A photograph is a record of a fleeting instant; a drawing is a composite of the artist’s experience” (1980). The drawn image is more informative. Of course, the field of photography has made leaps and bounds affording control down to the minutest level, but there is something irreplaceable to be found in the hand drawn image made from observation. The artist with pen in hand may have a more intimate experience of the specimen than the artist with the camera.

Q: Part of your artist’s statement inspirited a lot of curiosity in me. Can you explain further your meaning behind the statement “The tension that arises from conflating incongruous notions of nature – a mechanistic as well as a romantic, idealized concept – is a guiding principle for my artistic project”?

Ripley: I’m fascinated by how we define nature and how these definitions can contain contradictions. On the one hand nature is a self-perpetuating entity. I’m in agreement with the speculation put forth by the Deep Ecologists that says human beings will be the most short-lived of the dominant species this planet has known. (The dinosaurs ruled for millions of years and we were hardly here 100,000 years before we discovered the methods necessary for destroying ourselves. I think that when we’re gone there will still be something here).  We’re being swept along with everything else. Then there is the perception of nature that involves the bucolic and the nostalgic. The sublime is found in nature. We have this amazing capacity to see ourselves as distinct from (not within) nature, something separate from what we really are.

Q: Do you feel an association with the aesthetics of ‘steam punk‘? As if James West and Artimus Gorden from the Wild Wild West TV show were naturalists and not a spies?

Ripley: Aesthetically I do have a fascination with old things (things that have “survived” and how these can be reconsidered and re-purposed), but I’m not too familiar with this genre as a whole. Artistically speaking nostalgia can be a slippery slope. I am very taken by science fiction. The story ‘The Roadside Picnic’ by the Stugotsky brothers is crucial for me (as is the film Stalker, which it inspired).

Q: Insects are used predominantly in your work. Is there something about the insect as specimen, or the insect in a collection that is particularly attractive? What other taxa have you worked with in the past? Did you have any formal training in biology?

Ripley: I was originally attracted to insects because of their accessibility. Once I started looking for dead bugs they seemed to be everywhere. Then after a bit of a collection was established I began to get to know them anatomically by drawing them. So it became a fascination with both the specimen and the collection as a whole. Each insect had something new to see within it; how it worked and how it died. The collection became a opportunity to zoom in. The insect collection was really a first for me. And I’ll still pick up a dead bug if I see one.  These days I’m working on seeds and fish. My formal biological training is practically nonexistent. I think I might have scraped by with a C in high school but my artistic approach to science has initiated some self-guided research that has been informative although infantile and probably completely out of date.

Interested in displaying your insect inspired work as part of the Artist in Entomology Series? We have an open call for applications.

Hexapod Haiku Challenge – honorable mention

Monday, April 19th, 2010

Today’s post is perhaps the most difficult. There were SO MANY haiku and other short poems that we loved, and yet we can only represent a handful as honorable mention. The judges’ unanimity held together just long enough to bring some notes together on these poems. I hope you enjoy them as much as I did!

a caterpillar
dangling upon a leaf
awaits the miracle

Keith A. Simmonds
Crayford, U.K.

Judges’ Comments: Love the imagery. Metamorphosis, with all of its complexity, really can seem miraculous. In this scene the protagonist awaits transformation from (what could be interpreted as) a nasty caterpillar to (what are often described as) a beautiful adult. The spiritual motifs here are effective devices for representing (perhaps) the poet’s vision of what to an entomologist is an every day event – just one stage of a holometabolan’s natural life.

colony collapse
a honey bee lingers
at Saint Francis’ feet

Catherine J.S. Lee
Eastport, ME

Judges’ Comments: Saint Francis of Assisi is patron saint of animals. The honey bee, lingering,  seeks rescue from the disorder that is Colony Collapse Disorder.

Chiroptera Wars –
B. trigona mixes clicks,
jamming – survival

Sharon Silcox
Garner, NC

Judges’ Comments: Mixes, clicks, jamming … this is the vocabulary of music and sound, and yet the scene in engulfed by silence (to us). The choppiness of the words mimics the action it describes – the bouncing flights of a bat and its prey, a moth. The poem ends with “survival” but no punctuation; clearly the story, like evolution, continues. This poem is probably the best combination of science and art we read – every syllable, punctuation, meaning, imagery, etc. is purposeful.

dog day cicadas, abandon your tender skins, happy robins await
dog day cicadas
abandon your tender skins
happy robins await

Angie Werren
Amelia OH

Judges’ Comments: Can sense the heat of summer in that first line; in the 2nd line they shed a layer, almost as if to cool off, but then they’re vulnerable and get eaten.

rusty tackle box
among the tangled flies
a cicada’s husk

Pat Tompkins
San Mateo, CA

Judges’ comments: We love the mood, which suggests a passage of time through still objects; more than one “insect” is represented (flies and cicada); hints at spring, not in the usual way but through things that were left to sit over the winter and now need attention.

zoo cafe
her joy
at a bee!

Helen Buckingham
Bristol, UK

Judges’ comments: Very short and sweet. A true haiku in terms of its simplicity and celebration of emotion – representing a brief moment in time but eliciting complex emotions.

And finally (but not least) a couple of the myriad wonderful poems we received from the vast Balkan haiku plains:

Bending the grass blade –
a ladybird returns
to the starting point

Eduard Tara
Iasi, Romania

Copil în iarba-
tot univesul este
o buburuza
Child in the meadow-
the whole universe
is a lady bird

Tania Nicolescu
Tulcea, Romania