Now that I am in the habit of following the official dates of the seasons, this post shall span from the Winter Solstice on December 21st to the Spring Equinox on March 21st.
The best to come of this Spring has to be the shipment of Thyropygus pachyurus I received on March 21st itself. I have been working with a colony of captive-bred juveniles since February 18th, 2020, but this shipment constituted three subadults and three adults. Coincidentally, I seem to have two females and one male in both age groups. My juveniles were large by comparison to native US species, but the adults are about nine inches long! Somewhat unfortunately, I shall soon be seeing the three adults and a subadult off to their final home as I was but a relay point in their journey. They will be going to Arthroverts once weather is ideal for shipping and Easter has passed. I will be keeping a sexed pair of subadults for myself, however, and I hope that these will begin breeding within a year or so. I have been keeping my juveniles in the same general conditions as I described a while ago in my millipede substrate post. I have noticed that they really seem to appreciate a whole, rotten log to burrow into. Following the most recent substrate change, I gave the juveniles a log that already had the bark detached and laid on top. They immediately congregated underneath that bark. My eventual goal for this species would be to see it replace the now-nonexistent Archispirostreptus gigas in the US hobby. The USDA is the main roadblock at the moment, but this species seems to be quite benign and may be allowed to a wider group of hobbyists eventually.
The F2 generation of my lubber grasshoppers (Romalea microptera) began hatching on January 14th. I started the nymphs off in a tank with dozens of cuttings of a prolific Pellionia pulchra plant that is intent on taking over my scorpion tank. I was hoping that the plant would be a suitable food source for them that I could just grow inside the tank with the grasshoppers, but the picky plant murderers disdained that idea. I now have a tank full of a plant that the inhabitants have no use for other than a perch. It could be worse, but it would have been such a convenient food source considering I prune the scorpion tank every couple months. Trandescantia sp. are still the favorite food, and the one cutting of wandering Jew that I planted in the tank was demolished within days. I am currently taking advantage of spring bulbs, and feeding them well-washed daffodils. They seem to approve, and I have noticed a couple pre-sub-adult nymphs.
Interestingly, although I did not find any more oothecae than the original two despite a more thorough search, I noticed what appeared to be egg shells in the main tank itself. I am thinking I may have missed some oothecae in my searches because the original two oothecae were placed in 32-oz hatching cups. I estimate that the two oothecae hatched at least 60 nymphs together, so I may have over a hundred nymphs hiding in the plantings. I do not plan to conduct a census of these hooligans, however, so this shall be left to speculation.
Arwen died on February 7th, which makes her the longest mantis to have ever lived in my care (about eleven months). She laid fifteen oothecae prior to her passing, so I should have plenty of Arwen Jrs. presently. Right now, I have the oothecae prepared for a staggered emergence with most of them in the fridge.
The giant stag beetle larvae (Lucanus elaphus) are doing well. The largest of the male grubs is approaching 10 grams and is as large as the largest grubs I have found in the wild. The photo below shows the tanks of the captive bred grubs. The numbering scheme is that the number of the female (27, 28, or 30) is followed by the number of the larvae and separated by a dash. First, yes, there was a female number 29 (these four were the ones from July), but for some reason, there were no larvae to be found in her tank. Second, GSB 30-1, 2, and 3 were used in an experiment with a different type of flake soil fermentation method. Unfortunately, that flake soil exploded in mold, and I could not save those three grubs. The basic idea of that flake soil was to use a rice cooker to maintain a temperature of 150˚F, which was ideal for certain microbial processes to decompose the lignin and other inedible components of raw sawdust. The supposed benefit was that it would take less than a week to complete the fermentation period, whereas normal flake soil takes at least a few weeks. I have gone back to normal flake soil and rotten wood substrates, but it might be worth more experimentation for someone with more larvae to feed. Finally, it is indeed odd that there was only one grub from Giant Stag Beetle 27. I did not see any sign of cannibalism or such, just one lonely grub.
That is most of the happenings of the past couple months. Winter is cold and mostly boring for those who enjoy finding the larger arthropod species, and therefore, the ongoing colonies are my primary focus. It has warmed up in my area, and I am chasing tiger beetles right now. My green findings posts (2019 and 2020) may soon become a trilogy.
It appears that the past few months hath past without much notice from the perspective of this site, so this shall be a review beginning in December and extending to April 23nd.
In December, I completed a trade with another hobbyist. In exchange for four, captive-bred Heterometrus petersii scorplings and six baby green lynx spiders (Peucetia viridans), I received two adult male eastern Hercules beetles (Dynastes tityus) and about two dozen Turkestan roaches (Blatta lateralis). Both shipments were sent December 2nd to avoid Thanksgiving shipping delays, and all organisms arrived healthy. I provided the beetles a display tank, and although I had two males, I chose to house them together in that display tank the first night they arrived. I based this decision on the assertion in The Ultimate Guide to Breeding Beetles by Orin McMonigle that fighting is almost always harmless. Given that there was no female for them to fight over and that they were equal in size, it seemed safe to put them together. I have not heard of this being a problem for others, but one of the beetles, later named Jeremiah, mistook the other beetle for a female and attempted to mate with him overnight. This resulted in Jeremiah somehow pulling out part of the other beetle’s abdomen. I immediately separated them, and the injured beetle subsequently reabsorbed the disjunct part of the abdomen. Nevertheless, he died prematurely on January 5th. Jeremiah lived twice as long and died on Valentine’s Day.
Later in December, I began another conversation with the same hobbyist about a new trade. This time, I would be receiving a young Paragaleodessp. solifugid, a Mastigoproctus giganteus vinegaroon, and a group of five Tylobolus uncigerus millipedes in exchange for starter colonies of giant cave roaches (Blaberus giganteus) and orange-headed roaches (Eublaberus posticus) and a Brunner’s stick mantis ootheca (Brunneria borealis). Everything arrived healthy on both ends, except the solifugid, which appeared mostly dead. Following the recommendation of the other hobbyists to just give him some time as it might be molting behavior, I proceeded to thoroughly ignore the arachnid for the next couple months. On February 20th, I decided to finally give up and reuse the tank (I had given this guy a large tank), but I found that he was moving around finally. Considering this individual looked dead for multiple months, I have to wonder how many of these fuzzy little arachnids are mistaken for dead.
Another major development at the end of 2019 was the acquisition of my first dedicated macro camera. I had been looking for a camera that was more durable than the iPhone I had been using and was capable of switching between macro and standard photo capabilities relatively quickly. I found the Olympus TG-6, which is durable to the extreme, even giving me the option of underwater macro. I have yet to fully utilize all its features, but given that it is waterproof, I should be able to use it far beyond my pet insects. The photos on this post have all been shot with the new macro (except the mantis tank as it did not require high-resolution), and I think it is far superior to my clip-on lens, particularly when dealing with uncooperative (aka. fleeing) bugs. As the weather gets warmer, I hope it will allow me to take better in situ photos.
While not related directly to my captive arthropods, on the 24th of January, I saw a species of butterfly that I was not expecting to see in the wild: the atala (Eumaeus atala). This species was nearly extinct several decades ago. Nevertheless, its population has recovered due to the popularity of its host plant as an ornamental, and I saw this particular individual in Orlando, Florida.
Mid- February, I acquired some captive-bred Thyropygus pachyurus millipedes under one of my USDA PPQ 526 permits. Given that I think these millipedes could become a replacement for the now-scarce Archispirostreptus gigas in the hobby, I look forward to raising these millipedes to adulthood. Hopefully, the F1 generation of this species breeds as I recall reading that captive-bred A. gigas do not usually produce offspring, hence why they disappeared so rapidly from the US hobby.
March was the best month for my collection to date. On Pi Day (the 14th), the first of my Brunner’s stick mantids (Brunneria borealis) hatched from an ootheca laid by the adults I kept last year. (These nymphs are not from one of Jenny’s ooths, for those who were wondering. These are from Kim’s ooth.) As I mentioned in the linked post, these mantids hatch gradually from their ootheca, and as of 4/22, 38 nymphs have hatched from this ooth.
Feeding the nymphs was another problem I mentioned in the linked post above. I had read that nymphs of this species were quite delicate. As it turns out, this is apparently not true. My nymphs have been happily eating both Drosophila melanogaster and even the larger Drosophila hydei right after hatching. I also learned from mantodeology on Instagram that these nymphs should be fine in a large communal setup. In addition to that, he informed me that they benefit from a bioactive setup to allow for high humidity. I had originally been housing these mantids in individual, 32-ounce deli cups, but I was having significant die-off rates among the nymphs. I transferred them to a medium-sized Sterilite storage bin, and they did better but were still dying in disconcerting numbers. The next piece of inspiration came from ennisanna-fei, again on Instagram, through a post showing a mantis sitting in a Styrofoam container. This prompted me to take one of my Styrofoam coolers that was missing a lid and modify it by adding a glass door and a hole for an LED.
I am currently planning to make a number of mantis enclosures out of the higher-quality, construction-grade form of polystyrene foam. I just need to work out some of the minor details, such as how the doors will work, but I have a decent amount of insulation foam to experiment with. Regardless, this first Styrofoam tank has been perfect for these nymphs, and they are doing much better.
Another project that has been ongoing in my collection is a small blatticomposting bucket. I had wanted to work with blatticomposting for a while as it is simply composting by giving cockroaches random food waste. I did not want to accidentally poison a whole colony, however. The perfect opportunity presented when my orange head roach (Eublaberus posticus) colony had become a bit too large, but rather than cull the colony, I took a part of the colony and put them in a Home Depot bucket. I now had a distinct population of roaches for the blatticompost bin, and in case they found something toxic in the organic matter I gave them and died, I have a backup colony that continues to receive the same food as the other roaches. Despite the necessary precautions, the roaches in the bucket have thrived. They will eat nearly anything. In the picture below, the white clump partially buried in roaches is paper towels that they have been eating. While I try to avoid anything that is likely to have pesticides or toxic constituents (e.g. pizza), this bucket has become the trash can for my entire bug room, including dead or mismolted insects, even if it is other cockroaches.
Back in November, I posted a picture of my new, and first, tarantula: a curly hair (Tliltocatl albopilosum). While I am beginning to think that I am not feeding it as much as it would like and therefore inhibiting his growth rate, he has grown a bit. It does not particularly enjoy my presence, but hopefully, it will sit on the surface more when it is larger.
On March 21, the first four eastern lubber grasshoppers (Romalea microptera) from the ootheca laid by last year’s adults hatched. Two years ago, I also managed to persuade the adults to ovaposit, but I was unable to rear any of the offspring past a few molts. Suspecting my problems were related to enclosure design, I immediately cleaned out the old, massive tank and began constructing a bioactive enclosure with live plants (aka. all-you-can-eat-buffet) for the lubbers. The first ones received romaine lettuce and wandering Jew (Tradescantia zebrina) cuttings, but I planted cups of sorghum grain with the eventual plan of replaceable food generators. In addition to the sorghum cups, I planted one cup with ‘Gold Rush” bush bean (Phaseolus vulgaris) as I have been told lubbers have a inordinate fondness for legumes. As of April 23, I have over thirty baby grasshoppers eating everything in sight, particularly the poor wandering Jew cutting. A few of these nymphs are approaching an inch in length. I have had almost no deaths, that is unless these grasshoppers are adept at eating dead siblings immediately, but then why did I see the few dead that I did multiple days in a row (holding out hope they might be alive)? Regardless, they seem to be thriving in their oversized tank.
Those are some of the best developments in my collection, and hopefully, I will be back on schedule for May.