Save A Spider (Every) Day

Every day should be “Save A Spider Day,” considering all that these arachnids do for us as people, and ecosystems around the globe. Alas, March 14 is the only day officially designated for their respect, admiration and, at the least, tolerance. The timing this year is pretty good, though, given hysteria surrounding some sensational journalism, and a forthcoming field guide to spiders in North America.

Lucas the spider, © Joshua Slice, furnished by Sayles & Winnikoff Communications

I was prompted to write this post by Kelly Cleary of Sayles and Winnikoff Communications, the marketing company promoting a new Cartoon Network series starring “Lucas,” the fluffy, adorable animated jumping spider that took the internet by storm a few years ago. This is a wonderful, positive milestone for arachnid appreciation, and I am honored to be asked to be a messenger for something innovative and excellent.

There is the fictional, lovable Lucas, and then there is the Joro Spider, a real species that is getting the polar opposite treatment in the press. Eight years ago, a large orb weaver was discovered in the state of Georgia, USA, and determined to be Trichonephila clavata, a species native to most of Asia. This was considered something of a novelty at the time, but soon more individual specimens were turning up in nearby locations. Since then, the Joro Spider has expanded its range to include most of northern Georgia, and parts of northwest South Carolina and adjacent North Carolina. Single specimens have turned up in Alabama, and even Oklahoma, likely a result of someone unwittingly moving them on an object or vehicle.

Adult female Joro Spider © Kim Fleming via Bugguide.net

Recently, scientists have extrapolated the potential expansion to eventually include most of the Atlantic coast of the U.S., plus Pennsylvania, southern Ohio, Indiana, and other states. This is based on latitudes where the spider is found in its native Asia, plus the warmer maritime influence along the coast. This is what scientists are supposed to do when confronted with an alien species in a new territory: make predictions and then inform the public accordingly.

Unfortunately, journalists are prone to sensationalize this kind of information and, in this instance everything is, literally, being blown out of proportion. When they are young and small, spiders disperse themselves by “ballooning,” climbing to the top of tall objects, standing on tiptoe, and issuing long strands of silk to catch the wind. Someone forgot to properly explain this to reporters, so now we have the expectation of very large spiders raining down on us come springtime. Relax, it is not going to happen.

© Wikimedia Commons

Whether the Joro Spider is going to have a negative impact on native spiders, temporarily or permanently, will not be determined for some time. Any effort to control, or eradicate the Joro Spider is likely to have more dire ecological consequences than the spider itself. Do report your sightings with at least clear photos, if you cannot present an entomologist or arachnologist with the specimen itself. Otherwise, there is no need for overreaction.

Need help identifying the Joro, or any other spider? I have good news. My friend and scholar Sarah Rose has written Spiders of North America, in the Princeton Field Guide series. I will have a review here eventually, but suffice that I have intimate knowledge of the scope of this reference, its design and presentation, and can speak highly of the expertise and communication skills of the author. You will want to put in your pre-order soon.

Not everyone is a fan of spiders, likely not even everyone reading this post, but we can at least learn about their place in the natural order of things, and welcome them in our yards and gardens as free pest control, and architects of marvelous silken webs. Meanwhile, until journalism is more responsible, please help us spread correct information via social media and our in-person interactions with others. To paraphrase Smoky the Bear, “only you can save spiders.”

My Kind of Fourth of July

While most folks enjoy fireworks spectacles and flag-waving on Independence Day here in the United States, I would rather turn on our backyard blacklight and see what comes to visit. The neighbors did have some surprisingly professional-looking explosions, albeit they are illegal here in the city of Colorado Springs. I did my best to tune-out the loud noise.

Ruddy-winged Dart, Euxoa mimallonis

The U.S. was founded by immigrants, and has prospered from ethnic, racial, and cultural diversity, though we seem to frown on "minorities" in our present political climate. Here under my ultraviolet light, I see plenty of biological diversity, a melting-pot of insects that makes the ecosystem run even more efficiently than capitalism fuels our economy. One cannot help but observe the similarities, though the niches in ecosystems are filled by a variety of species while niches in the economy are occupied by only one: Homo sapiens.

White miller caddisfly, Nectopsyche sp.

Nature does not recognize villains or criminals or classes or any other structure relevant to our human societies. Every species is equal, adapting as it is able to constantly-changing conditions of climate, habitat, and competition from other species. Yes, some immigrant insects do compete with native species for the same "job" in the ecosystem, that much is obvious.

Damsel bug, Nabis sp., with leafhopper prey

While some insects do come to the blacklight to prey on other insects, most coexist peacefully under the purple glow. Occasionally one will blunder into another, causing both animals to run erratically or fly abruptly, only to quickly settle again without armed conflict or undue protest. Still other insects make a brief appearance, flirting with my desire to take their picture. Sometimes I get the shot, often I do not.

Crambid moth, Pyrausta insequalis

Every color of the rainbow has arrived. White is among the rarest. There is green, red, yellow, orange, black, brown....There are plain, monochrome bugs, and those with patterns too intricate to imagine. The moths often lose their colors as the night wears on, the scales on their wings lost with each wingbeat, each collision with the abrasive netting protecting the blacklight, each collision with another insect. It does not hamper their flight in the least.

Ant-mimicking plant bug, Pilophorus sp.

This one night, our celebration of America's birthday, may also be an insect's final fling, its days as an adult all too brief, just long enough to find a mate and reproduce. Some moths flourish for only a week at most, sometimes even more briefly. They have spent the bulk of their lives as caterpillars, larvae that are feeding-and-growing machines. At the end of that worm-like stage they transform into the pupa. Apparently inert on the outside, the pupa is a frenzy of internal reorganization as cells are re-purposed, some genes are turned off, and other genes turned on. It is a microcosm of a rapidly-changing economy with employees re-trained, whole new industries born, with all the promise of positive change each would suggest.

Delphacid planthopper, Bostaera nasuta

Has my blacklight beacon derailed the destinies of these insects? Some will surely be diverted from their procreative goals, from their foraging missions if they feed as adults. I make a point of turning the light off before I, myself, turn in, to give the insects a chance to resume their lives without distraction, though in a city full of lights they may well end up concentrated at the neighbor's porch light, or a streetlight up the boulevard. It is a hazard of urban living for those insects that reside in cities.

Green lacewing, family Chrysopidae

At last the auditory noise has abated, and the attractiveness of the blacklight has reached a point of diminishing returns. I must sleep, and it will only be four or five hours until the sun peeks over the eastern horizon to put an end to the nocturnal adventures of these tiny arthropods. The summer days are long, the nights brief, and insects must make the most of that narrow window of darkness. The day shift will begin, and niches will transfer ownership accordingly. There is no timecard to punch, but there are no holidays, either, no middle management, just life, pulsing as it will.

Be Thankful for "Bugs"

A couple days ago the following post crossed my Facebook newsfeed, and it is an excellent reminder of why insects and other arthropods are so important to us as human beings, and to the planet Earth as well.

Honeybee pollinating flower in Arizona

"Thanksgiving is tomorrow …and we all have much to be thankful for. But don’t forget to thank our pollinating friends (bees, beetles and a host of other critters) that provide 1 out of every 3 mouthfuls of food and drink we consume. Without them, and the invaluable service they provide, our lives and our world would be drastically different. Happy Thanksgiving!"

Ecosystem Services

Beyond pollination, insects and related invertebrates furnish many other "ecosystem services" that we can't easily put an economic price on. They are responsible for seed dispersal in many plants. They are at the front lines in the decomposition process for all organic matter be it animal or vegetable. Their activities aerate and mix the soil. They serve as the basis of the food chain, feeding other invertebrates and many vertebrates from fish to birds to bats to aardvarks and anteaters.

Dung beetle pair rolling dung ball in Kansas

A scientific article was published in 2006 in the journal Bioscience that attempted to quantify just four of these ecosystem services: pollination, pest control in croplands, waste (dung) removal on rangeland, and food for wildlife (recreational hunting, fishing, birdwatching, etc). The carefully calculated estimate of the value insects thus provide, in the United States alone, was a staggering sixty billion dollars ($60,000,000,000).

Golden-winged Skimmer dragonfly in GeorgiaWatchable Wildlife

Insects are quickly becoming "watchable wildlife" in their own right. Countless field guides and online resources cater to those who enjoy observing butterflies, dragonflies, moths, tiger beetles, and nocturnal "singing insects" like katydids and crickets. What will the next craze be? It is clear that these communal passions are not only sustaining themselves, but actually growing in popularity, as witnessed by the explosion of National Moth Week, for example. There are festivals for everything from butterflies to bees, even mosquitoes (in Paisley, Oregon).

Drosophila "fruit fly" in ColoradoResearch and Medicine

Insects and other arthropods are also used extensively in scientific research and medicine. We owe much of our knowledge of genetics to research conducted on "fruit flies" (Drosophila spp.) and flour beetles (Tribolium spp.). Fly larvae are used to clean wounds because they carefully avoid living tissue while secreting fluids with antibiotic properties. Many patients with joint inflammation and diseases swear by "bee venom therapy," even though it may be relegated to the category of alternative medicine by the healthcare establishment. Spider, scorpion, and insect venoms continue to yield promising derivative compounds. Some fireflies produce chemicals that show promise in fighting herpes.

Paper wasp nest in Cape May, New JerseyArt, science, and inspiration

Many people find inspiration in the world of insects. We owe the invention of paper to ancient peoples in Asia who observed paper wasps constructing their nests of chewed wood and plant fibers. We continue to refine the performance of our aircraft thanks to experiments on, and observation of, insect flight. Insects are being enlisted in the fight against terrorism because of their acute chemo-tactile senses that far exceed our own abilities to detect harmful substances and agents; and their small size that allows them access to the most remote cracks, crevices, and other cavities. Artists are endlessly inspired by the beauty, colors, and patterns of insects.

Cochineal scale insects on cactus, ColoradoRaw Materials

Lastly, insects and their kin provide us with many invaluable raw materials and products. Silkworms and spiders produce silk with different properties of strength, durability, and elasticity, often exceeding the quality of synthetic fabrics. Honeybees produce honey, and beeswax. Cochineal scale insects produce organic scarlet dye, and the lac scale insect yields shellac. Many cultures also consider insects themselves as a staple food source, a practice known as "entomophagy" that is steadily gaining favor in modern western cultures.

Tiny gall wasp (Cynipidae) I found yesterday, ColoradoPersonally....

Personally, I value insects and arachnids as an endless source of fascination. Their physical diversity is mind-boggling. The behaviors they engage in are amazing. You can find them anywhere and everywhere, even inside your own home in the middle of a cold winter. Their stories demand telling, and I feel honored and privileged to have a modicum of ability to bring them to life for others.

What is it about "bugs" that you are thankful for? I encourage you to share your thoughts and feelings here.

Source: I wish to thank the Missoula Butterfly House and Insectarium for sharing the quote at the top of this post. Please visit their website, donate if you are able, and "like" them on Facebook. Thank you.

Holiday Gift Guide 2012

At this time of year I like to give a free plug to products that I have found useful myself, or that I believe would be beneficial to my readers and their friends. This year has seen a trio of books that I am proud to sing praises of. I even lent images and text to one of them. Enjoy!

Kollath+Stensaas Publishing continues to turn out highly useful, generously illustrated, and compact regional field guides on subjects seldom treated by major publishing houses. The latest from their presses is Insects of New England & New York, by Tom Murray.

Tom is a prolific photographer of invertebrates and his images here are more than worth the $18.95 retail price of the book. I was profoundly flattered to receive a free copy, but even more astounded to read the acknowledgements:

”When I was first becoming serious about insect photography, Eric Eaton….would regularly visit my website and identify my photos. With Eric’s encouragement I joined www.Bugguide.net in March of 2005.”

Tom should be very proud of what he has done with that “encouragement.” Critics will say that the images of insects identified to species, or even genus, can be misleading to users trying to make their own identifications. This is true, because many species look essentially identical, or are conversely highly variable in color, pattern, and/or size. I would make the counter argument that one goal of a field guide should be to illustrate just how incredibly diverse invertebrates are. Tom and the publishers achieve this in boatloads.

Insects of New England & New York is more comprehensive than most field guides to insects for any region. It should be a standard reference for students of all ages throughout the northeast U.S. and adjacent southern Canada. Still can’t get enough of Tom’s photography? Then please visit his amazing galleries at pbase.com.

Another good friend, who I have yet to meet in person, had her own book come out this year. Seabrooke Leckie, together with David Beadle, produced the Peterson Field Guide to Moths of Northeastern North America (Houghton Mifflin Company).

Seabrooke lives in the wilds of Canada, assuring that any U.S. bias was curbed at least to some degree in the coverage of this book. Those that are familiar with Charles Covell’s A Field Guide to Moths of Eastern North America (Houghton Mifflin Company, 1984), also in the Peterson series, might think this new book to be redundant at best. Not true. Beadle and Leckie cover more species, and illustrate them with images of live specimens. No more pinned specimens with wings spread out. What you see at your porch light is what you will see in this book. Common variations in color and pattern are also shown for those species that vary in their appearance.

This book exceeded my expectations. One thing you might find puzzling, as I did, are the green, red, and orange bars next to the name of each species. Those bars represent “spring,” “summer,” and “fall” respectively. Beneath the bars is a black line that is not readily apparent, but which indicates the flight period for that species. This is explained in the “how to use this book” chapter, but it could have benefitted from a diagram. That is a minor negative, completely overwhelmed by the quality and comprehensiveness of this guide.

Seabrooke is a very gifted writer, and one’s style can be cramped by the constraints imposed by field guides. You owe it to yourself to visit her blog, The Marvelous in Nature, for a dose of her engaging style.

Last, but not least, Kenn and Kimberly Kaufman have another hit in the Kaufman Field Guide series with the Kaufman Field Guide to Nature of New England (Houghton Mifflin Company). Kenn was kind enough to approach me to contribute the terrestrial invertebrate section, both text and a few images, for which I was very grateful. Income never hurts, but it is always a joy to work with him on a new project.

Again, this book far exceeded my expectations, even though I should have known better. Yes, virtually every organism you are likely to encounter, plus geology, weather, and astronomy are covered in this book. From your backyard to the wilderness, it’s in there. Tidepool life, and open ocean fishes are even included. Wait, there’s more! You also get….passages on habitats, sustainability, endangered species, conservation, and invasive species. Now how much would you pay? Ahem. Sorry, I was momentarily channeling infomercials.

I am certain it is not coincidental that all three of these books are focused on New England or the northeast U.S. It makes sense for the publisher, as this is where the majority of the human population lives, recreates, and does business. I look forward to participating in the creation of more regional guides in the future. Breaking our biosphere down into bite-size regions means that you can cover more species.

There you have it, the three books that I think every naturalist should have on their shelves this year. Let me know your opinions, and feel free to make additional suggestions.

Halloween Special: Ghosts and Pirates

What is more appropriate for Halloween than ghosts and pirates? We are not talking about trick-or-treat costumes, though, but spiders. Come to think of it, what is more appropriate for Halloween than spiders?! Just last week I found both kinds on an unseasonably warm night (October 21) here in South Deerfield, Massachusetts.

Both ghost spiders (family Anyphaenidae) and pirate spiders (family Mimetidae) prowl in search of prey. The similarity ends there, though, as they don’t resemble each other in the least, and their lifestyles are very different.

Ghost spiders are, not surprisingly, pale in color for the most part, and generally nocturnal in their habits, haunting foliage in pursuit of insects to eat. By day they hide in curled leaves that they tie together with silk.

Despite their name, ghost spiders are not very intimidating to humans. Adults reach a maximum of only a bit more than 8 millimeters. This one, a specimen of Hibana gracilis, was probably about six millimeters in body length. Big enough to take down the midge it is munching on, though. I think spiders recognize on some level the attractiveness of outdoor lighting to insects, as that is the situation I found this one in, and the pirate spider as well.

Pirate spiders are easily identified by their four eye patches and two wooden legs. But seriously, folks, the long spines on their legs help differentiate them from the cobweb spiders and sheet-web weavers that they otherwise might be mistaken for. The resemblance to other spiders is further complicated by the fact that you sometimes find pirate spiders in the snares of cobweb weavers. Their appearance there is as sinister as their name suggests.

Pirate spiders eat cobweb spiders, as well as orb weavers and other spiders. They dispatch the rightful owner of the web by biting the other spider on its legs, feeding from one after the other until the victim is totally drained. One reason for attacking the legs of its prey might be that the jaws of pirate spiders are fused at their base, not permitting the spider to open its mouthparts wide enough to bite other parts of its victims.

The specimen I found last week was Mimetus puritanus, the most common species in the eastern United States. There is a total of fourteen species in the genus in North America, however, and another ten that remain undescribed (awaiting the assignment of names by arachnologists).

BOO! Just making sure you are still paying attention. Ar-r-r-r-g, matey! Be on the lookout for ghosts and pirates in your own neighborhood.

Earth Day Bugging You?

We might as well refer to “Earth Day” as “Bug Day.” Insects, arachnids, and other arthropods account for over 80% of the planet’s biodiversity and biomass. They are the foundation of many food chains, the decomposers of the dead, pollinators of plants, agents of seed dispersal, and the subjects of important scientific research. No, despite all of this, we still gravitate to cute and cuddly vertebrates, the “charismatic megafauna,” as symbols for Earth Day.

We collectively tend to think of insects as organisms that will lay claim to the planet once humans have left it beyond repair, but the truth is that many insects are just as vulnerable as vertebrates to environmental degradation. State and federal lists of threatened and endangered species often include insects and other invertebrates among their ranks. Many of those are inhabitants of freshwater, cave, or dune ecosystems, among the most fragile of habitats.

While it has been difficult to gain protection even for vertebrates, endangered insects and their kin are often viewed as impediments to economic development and prosperity. “Bugs” clearly need an agent experienced in public relations and spin control. Maybe even a pitch man. Hey, where is Billy Mays when we really need him?

Earth Day would be the perfect stage for promoting insects and other arthropods as the support network for our planet. Further, as I often say, “biodiversity begins at home.” What better way to drive home that point than by lobbying to curtail the use of do-it-yourself pesticide chemicals and treatments? You would kill two birds with one stone (or possibly let two birds live by eliminating a source of environmental contamination, and promoting a healthy balance of predator and prey in the home and garden).

Entomologists, science writers, and media professionals all need to do a better job of broadcasting the fundamental truths about what arthropods mean to nature and humanity. We have been too timid, too remiss, too wrapped up in research and writing about topics that we think we can “sell” to editors, publishers, and radio and television executives. It is time for a change, and we can make it happen. Yes, we can.

For another take on Earth Day, please see Sense of Misplaced. Thank you.