Arachtober, Part XV!

This year marks the fifteenth anniversary of “Arachtober,” an event initiated on the photosharing website Flickr by my good friends Ashley Bradford and Joseph Connors. Since then, it has extended its silky reach to social media, especially Twitter and Instagram, where searching on #Arachtober will bring up stunning images of spiders, scorpions, solifuges, ticks, and mites, oh my.

© Ashley Bradford & Joseph Connors

The banner shown above was hand drawn by Ashley, and digitized by Joseph. They both have acute powers of observation, and are supremely talented photographers who are constantly experimenting. They have inspired literally thousands of others to focus their lenses on our eight-legged friends, and come together as a global community for at least this one month each year.

You should join in the fun! It is a window on an overlooked, seriously maligned group of organisms, illuminated in a positive light by photographers and scientists. I learn something new almost daily thanks to the stories attached to the photos.

I will forever be indebted to Ashley and Joseph for their supportive friendship, and starting something truly unique, valuable, and enduring. More details about the origin of Arachtober can be found in this livescience.com article.

World Bee Day....A Little "Bee"hind

World Bee Day happened the other day, May 20, and it caught me off guard. I had never heard of it, and hustled to make some social media posts for the Facebook groups I founded or administer. I will plan a bigger campaign of celebration next year, but for now....

In fairness, World Bee Day has not been in existence very long. The date honors the birthday of Anton Janša of Slovenia, a pioneer of modern beekeeping in the eighteenth century. The United Nations passed a resolution submitted by Slovenia in 2017 to so honor him. While beekeeping in the northern hemisphere applies only to honey bees in the genus Apis, the U.N. has chosen to use World Bee Day as an opportunity to acknowledge all bee species, the vast majority of which are solitary and not managed by human beings.

North American bees range from giant "large carpenter bees" like this one....

Given the plight of pollinators in general, and the threats to apiculture (beekeeping) from mites, pesticides, industrial-scale agriculture, habitat destruction, and climate....anomalies of increasing frequency, it is easy to be pessimistic and sorrowful on World Bee Day. However, there are signs of hope all around us.

....to tiny Perdita mining bees like this one.

More people are taking up apiculture as a hobby, for example. Even better, many homeowners and small-scale farmers are recognizing the importance of native bees and building simple housing for them in the shape of "bee condos." Now a small movement is building to advocate for allowing those bare patches of soil in your lawn and flowerbed to lie fallow. The overwhelming majority of solitary bees in North America nest in burrows they excavate in the ground. Sometimes many females will nest in close proximity, giving the illusion of a "hive" or a swarm. This is not the case, and unless you step on a bee in bare feet or forcibly grab one, it is not going to sting you. Different bee species prefer different textures of soil, from sandy to clayey.

Leafcutter bees, Megachile sp., using "bee block."

Among the many reasons to celebrate World Bee Day this year is the rediscovery of the world's largest bee, Wallace's Giant Resin bee, Megachile pluto, nesting in termite mounds in Indonesia. It is an important reminder that the natural world is resilient, to at least some degree, and that most species can persist even in unfavorable circumstances.

Female cactus bee, Diadasia sp., entering her burrow.

Colorado, where my wife and I live, ranks fifth in bee diversity in the USA, boasting at least 946 species from huge bumble bees to tiny mining bees in the genus Perdita. California (1,651), Arizona (1,182), New Mexico (991), and Utah (979) rank ahead of us. That makes for a lot of bee species that need conservation if we want to continue enjoying wildflowers and eating everything from blueberries to squash to almonds.

We can encourage bees by....

• landscaping with native trees, shrubs, herbs, and flowers.
• Erecting bee blocks as supplementary housing for solitary bees (and wasps) that normally nest in the dead trees we cut down and logs we haul off.
• Become "weed tolerant" of plants that volunteer in our yards, as long as they are not state-listed noxious weeds. Chances are they are native or naturalized wildflowers instead.
• Leave a few bare patches in the lawn (if you still insist on having a lawn) and flowerbeds so that ground-nesting bees have a place to call home.
• Advocate for changes to municipal and HOA codes and rules that currently discourage eco-friendly landscaping.

It goes without saying that eliminating pesticides and other chemicals from your yard and garden will greatly benefit all life, not just on your property but elsewhere, too, as pesticides drift on the wind and flow in runoff from rain and watering.

Female sweat bee, Agapostemon sp., living up to her name.

World Bee Day is behind us this year, but no worries. You can gear up now to celebrate National Pollinator Week next month, June 17-23, 2019. Tell me how you plan(t?) to respect that designated "holiday." Maybe you need to do what I should do, which is call my governor and ask why Colorado is not yet on the map for it....

Cuckoo bee, Nomada sp., leaving (left), small carpenter bee, Ceratina sp., arriving (right).

Book Review: Never Out of Season

Rob Dunn grabs your attention right out of the gate in his book Never Out of Season (Little, Brown and Company, 2017, 323 pp). Our monotonous diet, and utter lack of crop diversity is not just stunning, it is frightening. The book's subtitle, How Having the Food We Want When We Want It Threatens Our Food Supply and Our Future, is a bit misleading. First, that applies mostly to Western cultures which are affluent enough to import fruits and vegetables from other parts of the world, continually. To his credit, Dunn addresses global agriculture and food security, going out of his way not to ignore Third World nations, poverty, war, and other factors that influence the ability of countries to feed themselves, let alone the rest of the world.

Indeed, Dunn's historical accounts demonstrate how time and time again human populations has been on the brink of starvation, yet are bailed out by individuals and organizations on the far side of the globe. It has been Russians and others who have had the foresight to save seeds in banks and vaults, preserving crop diversity even at their own personal peril. Meanwhile, governments and industries have blissfully ignored the lessons furnished by famines and crop failures.

Never Out of Season is in many ways a real-life thriller, but the reader is largely left to draw their own conclusions as to who the villains are. There are plenty of victims and heroes, but aside from a small group of henchmen who sabotaged a cocoa tree plantation by deliberately infecting trees with a fungal disease known as witches'- broom, few criminals. At least, they do not have overtly hostile intentions. The problem is, overwhelmingly, neglect, plus failure to learn from history and failure to properly invest in efforts necessary to avert future calamities.

The progress of the Green Revolution creates the narrative arc, from its beginnings around World War II through present day. Humanity quickly became dependent on pesticides, fertilizers, and other chemicals to increase crop yields and exploit marginal soils. From there, agriculture scaled up, and today it is largely the province of multinational corporations with a primary agenda of profit and patent protection over feeding people. Consumers are left with increasingly processed foods in the supermarket, the illusion of choice, poorer nutrition, and a widening disconnect with farmers. Dunn is less simple and direct in his presentation of the state of agriculture, and how we got here, but is captivating, entertaining, and educational in his language. His research is exhaustive and beyond reproach. The end notes take up forty-six (46) pages.

Readers looking for an unequivocal indictment of industrialized agriculture will have to search elsewhere. Never Out of Season presents a series of cautionary tales that inform, enlighten, and serve as examples of the kinds of catastrophes we are in for if we continue to devalue genetic diversity in our food crops. Genetically Modified Organisms (GMOs) are not painted as evil here, but powerful tools that can help advance agriculture provided we do not become as addicted to them as we did to pesticides, herbicides, fungicides, and phosphate fertilizers.

Dunn also offers hope at the end of the book, successfully energizing and empowering the reader to plant their own yards with vegetables and fruit trees, join in citizen science projects to enhance our collective understanding of agricultural ecology, and to purchase from local farmers those foods they cannot grow. The variety of approaches to agriculture is beginning to diversify, which is a positive trend, but it remains to be seen whether agri-business will respond favorably, or seek to bury smaller entities under patent-infringement lawsuits and other legal strategies.

Paul Ehrlich, in his own endorsement, states that "Everyone who eats should read Never Out of Season. This reviewer could not agree more. Even fans of fiction would be hard-pressed to find a more compelling page-turner replete with colorful and heroic characters, and an ending that only we, the reader, can finish by holding our leaders accountable for funding priorities, environmental regulation, making conservation of heritage seeds an overriding concern, and bolstering consumer protections. We can also shop smarter and grow our own.

Facebook: An Expanding Portal to Entomology

The internet has made the scientific community vastly more accessible to the general public, but social media has taken that to yet another level. Whereas it once took hours, if not days, of research to get an answer to a question, or the identification of an organism in an image, success can now be had in minutes. Facebook in particular has exploded with specialized "groups."

No matter how offbeat your entomological interest there is no doubt a Facebook group devoted to it. Are you a moth fanatic? Ha, so are over 3,300 other people who have already joined the "Mothing and Moth-watching" group.

You might worry that the membership represents a "blind leading the blind" assortment of amateurs or newbies, but most of the time there are plenty of professional entomologists and experienced citizen scientists offering help, sharing announcements of new research, or simply posting stunning images. Take the "Hymenopterists Forum," for example. I have queried this group a number of times with images of wasps, bees, or ants that I was having trouble identifying. I am always met with courtesy and respect, though I am careful not to post too much, too often.

Are your interests regional in nature? New groups continue to sprout which are regionally-centered geographically. I know because I have started four of them myself. Maybe you want to know more about dragonflies and damselflies of the southeast U.S. Voila! "Southeastern Odes" is at your service.

One of the most wonderful aspects of Facebook groups is that they usually have a global membership, and you can always stand to learn from others in far-flung locations around the world. The "Friends of Coleoptera at the Natural History Museum" group reflects beetle experts at the museum in London, England, for example, but they are incredibly friendly to everyone, and highly knowledgeable of beetles from all over the planet.

Still can't find a group that suits you? The answer is easy: create your own. Facebook makes the process of founding a group very easy and relatively intuitive. Do pay attention to the settings ("public," "closed," "secret"), and be mindful that as an administrator you will need to be vigilant to welcome new members, delete spam and its originators, and post regularly to keep your group on the Facebook radar.

I had to be metaphorically dragged into social media back in 2009, but I could not be more grateful to those who nudged (pushed?) me into it. Through Facebook I have made many new friends in the truest sense, learned more than I could have imagined, and helped others. I highly recommend taking full advantage of social media avenues in your own pursuits.

A Bed Bug Primer

”Sleep tight, don’t let the bed bugs bite.” That rhyme had no relevance for decades, but not any longer. After vanishing from the scene after World War II, bed bugs are back in our nightmares and, more importantly, our reality. Thankfully, bed bugs pose no threat from the transmission of blood-borne pathogens, but what they lack in virulence is more than made up for in litigations. Here is what you need to know about these insidious pests.

What is a Bed Bug?

Cimex lectularius is a member of the family Cimicidae in the order of true bugs (Hemiptera). Like all true bugs they have piercing-sucking mouthparts. Bed bugs use their beaks to drink the blood of human beings. Yes, we are the preferred host of this parasitic insect. Pets, other mammals, and birds suffice in a pinch for starving bed bugs, but people are the real target.

These are small, wingless insects, dorso-ventrally flattened (top to bottom) to the point of being paper thin. Adults measure only 4-6 millimeters, 7-8 millimeters immediately after feeding. First instar nymphs (those just emerged from the egg) are only one millimeter, and so pale as to be nearly invisible on the typical mattress or sheet.

First instar bed bug nymphLife Cycle

Bed bugs go through five instars before becoming adults. An instar is the interval between molts. Each bed bug must have one blood meal in order to graduate from one instar to the next.

Bed bugs of various instars

Eggs usually hatch 6-10 days after being laid, though it can take up to 21 days. Each nymph stage lasts about one week under ideal conditions, longer if blood meals are irregular. Adult bed bugs typically live ten months to a year, feeding about every ten days. Since the average female can lay 500 eggs in her lifetime, you can imagine how quickly a population of bed bugs can build.

Second or third instar nymphDo I Have Bed Bugs?

Obviously, inexplicable bite wounds can be a clue that you might have bed bugs. Bites are typically in a linear arrangement of three, evidenced as red, slightly-raised welts. However, some people do not react at all to bites, while others experience worse symptoms. If your bedmate complains, take them seriously.

A fair-sized population of bed bugs gives off a sweet, distinctive odor, so use your sense of smell. The French word for bed bug is punaise, a reference to this stinky aspect of bed bug biology.

If you suspect bed bugs, strip the bed and look for the insects and their signs, especially along mattress seams, under mattress buttons, the slots where the bed frame attaches to headboard and footboard, and other tight spaces. Bed bugs have to poop, and reddish or dark brownish stains are another sign of their presence.

Avoiding Bed Bugs

Inspect, inspect, inspect! You cannot be too careful in avoiding infestations. When traveling, inspect your lodging thoroughly, and elevate your luggage off the floor. Maybe put the suitcase in the bathtub. Look behind headboards that are flush against the wall. Take drawers out of the nightstand and examine them carefully. Look under carpet where it goes up the wall like a baseboard. Look in mattress seams and under mattress buttons.

Any place where there is serial occupancy is prone to infestations, from five star hotels to rental cabins, dorms, prisons, hospitals, movie theaters, planes, trains, buses, taxicabs….

Beware of secondhand furniture and avoid used mattresses. The rise in popularity of thrift stores is credited in part with expanding the bed bug empire, so again, inspect items thoroughly before purchasing.

Treating for Bed Bugs

Don’t panic, but do seek professional help. Bed bugs are extremely difficult to eradicate, so find a reputable, recommended company that has a successful track record. Understand that the extermination process is highly invasive. Furniture will have to be taken apart, perhaps even discarded. Your best bet may be heat treatment. Unfortunately, this is usually the most expensive option, but it is highly effective.

Complications may arise if you are in a multi-family dwelling, rental, or are the proprietor of a hotel, motel, campground, or other lodging enterprise. This is when legal representation is often sought to determine (or avoid) liability. Do make sure your interests are protected, but try to refrain from making any situation more adversarial than it already is.

Sources: Berenbaum, May R. 1989. Ninety-nine Gnats, Nits, and Nibblers. Urbana: University of Illinois Press. 263 pp.
Centers for Disease Control and Prevention. 2013. Parasites – Bed Bugs
Maestre, Ralph H. 2011. The Bed Bug Book. NY: Skyhorse Publishing. 181 pp.
National Institutes of Health. 2014. “Bedbugs,” Medline Plus.

The Germans Are Back

The other day I came out of my apartment to find a piece of paper stuck in my screen door. I was dreading reading about a rent increase, but the announcement was unpleasant in a different way. “We are starting a new program here at (name of apartment complex)” began the notice. Turns out that the management is initiating an ongoing pest control schedule, no doubt due to someone complaining about German Cockroaches, Blattella germanica.

I have had German roaches in my own apartment previously. Initially I did not treat for them because a Mediterranean House Gecko, Hemidactylus turcicus, had also taken up residence in my kitchen and kept the roach population to tolerable levels. Eventually, the lizard died, and then the roach population exceeded my psychological and physical “carrying capacity.”

I reluctantly purchased some roach bait traps, and that did the trick….until a few months ago, when I saw another roach. In the last month I have killed two: a male and a female. Still, I have a hard time with the invasion of privacy that comes with an extermination service, not to mention having some trepidation over whatever chemical treatment they are applying.

Ok, enough about me, how about some background on the German Cockroach? It is believed that most of our “domiciliary” roach species are native to tropical Africa, and can only exist outside their normal geographic range by occupying buildings that offer a year-round approximation of their tropical homeland. Why are they called “German,” then? Well, here in the United States at least, we have a history of naming economic pests after nationalities that we have had conflicts with. So, given our World War II enemies, it seemed fitting to apply the “German” epithet to this particular roach species (in Germany the species is called the “Russian” Cockroach).

The German Cockroach is one of the smaller roach species, ranging from 11-13 millimeters in length. Consequently, it is sometimes mistaken for some other kind of insect and dismissed. There is no ignoring their numbers, however, and opening a cupboard can send dozens of them scurrying for darkness in a dwelling that is infested with them. Males are sleek, slender, amber-colored insects, while females tend to be darker and more robust. Both genders are shown in the images here. See if you can tell which is which.

As far as I am aware, domestic pest roaches have only been implicated in the mechanical transmission of bacteria, never actually proven to be carriers of Salmonella and other treacherous microbes. Roaches groom themselves constantly, lest they themselves become victims of pathogens and fungi. This is not to say that cockroaches are at worst a nuisance. Far from it.

What has been conclusively demonstrated is that cockroach body parts, shed exoskeletons (remember roaches have to molt to grow), and fecal matter are a major, major trigger of asthma, especially in children. This is one reason that neglect of public housing should be a crime: improper maintenance can lead to chronic health issues that are far more costly to society (and the individual) in the long run. Also, entomologists who study roaches in the lab frequently develop allergies to roach exoskeletons, feces, and body parts. Such afflictions are sometimes severe enough to cause the scientists to abandon roaches as study subjects.

Cockroaches are successful organisms for several reasons. They achieved near perfection in the evolutionary sense millions of years ago, judging by the fossil record of roaches that are essentially identical to contemporary species. They are generalist feeders, able exploit all manner of organic matter. They are adept at detecting and avoiding poisons, being able to taste-test food before ingesting any. They reproduce at a rate that makes rabbits envious.

Female German Cockroaches cannot be accused of parental neglect. Once mated, a female will produce an egg capsule called an “ootheca.” Each ootheca contains an average of 30-40 eggs. The female carries the capsule at the tip of her abdomen until just before the eggs are ready to hatch. Then she carefully deposits the egg case in a crack or crevice where the cockroach nymphs can emerge in relative safety. Each female roach can produce several ootheca during her lifetime.

A typical roach population is a youthful one, comprised of about eighty percent nymphs of various stages and twenty percent adults. I haven’t seen any nymphs in my home lately, and I hope it stays that way.