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About JKim

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    Louisiana, USA
  • Interests
    Scarab Taxonomy

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  1. Just regular oak substrate. very well fermented. Nothing special really..lol. I had some A/C problem here and had my place going well over 100˚F during the day for about two weeks, and most larvae died. (as well as many other adults and larvae of other species). But those Dyscinetus morator survived has reached L2 and L3. I think I heard they feed on grass root to develop, but... I guess that is only the case in outside, not with man-made substrate with more nutrition compared to just dirt out there...
  2. JKim

    Ox Beetle (Strategus antaeus)

    The peak adult flight period for Strategus antaeus in Louisiana occurs from the last week of May to the first week of June, and adults have been taken from May into September. However, males seem to only be found in earlier time from May to June, and females are more broadly found until later time. The lastest I collected female was sometime in July from Natchitoches Parish. Most numbers I've observed in a single night was about 4 adult pairs. Most numbers I have observed in a single year was probably over 10 males with about 7 females within two weeks. Within Louisiana, I've collected numerous numbers (not many, but quite numbers) in Natchitoches Parish alone, but we have discovered from couple different sources including LSU collections, references, other private collections that they have been recorded from Acadia, Rapides, St. Tammany, and Tangipahoa parishies. However, we have only discovered a single specimen from each parishes other than 59 in Natchitoches upon the publication of research. Send me your email link, I will provide our research article about this species and all other Strategus spp. recorded in Louisiana. I'm unable to attach it here due to max total size of 0.49 MB.
  3. JKim

    Best find thus far... rhino beetle!

    Good findings! It is always excite to know there is something in your town. I have quite number of dead Xyloryctes thestalus in alcohol. If you can collect couple adult pairs, would you be willing to trade with me? I'm located in Louisiana, and have no access to find them anywhere nearby. X. thestaulus I have are personal collections from Arizona, last year.
  4. I cannot believe you never found D. grantii while you are located in Scottsdale, AZ, and have been to that Home Depot in Payson for past 2-3 years...
  5. Here is a batch of eggs laid by Dyscinetus morator. I've probably collected thousands of these a decade, and this year is my first time ever attempted to rear them. It was interesting to see how they lay quite a lot of eggs in one spot, instead of here and there sparsely one by one. This is one of the largest batch I've seen while digging through a 16 oz container with fully filled substrate with about half inch space at the top. My specimens loved jellies, so I'm assuming each different jellies are differently preferred by beetles.. (of course, they are differently manufactured!) My substrate was somewhat too wet and wasn't in a good condition, and that might be the reason.... that only some eggs actually hatched, and has reached L2 larvae. I haven't touched them since about a month ago, so I don't know if any of them reached L3 yet.
  6. JKim

    Sales of A.dichotoma in the US?

    Let me add more to what two above has said: Just because a particular beetle is hatched and reared in the U.S., does not make it NATIVE INSECT, especially when kept indoor by a person on purpose. If they are somehow introduced naturally, unintended, and reproduced in the U.S., they can be considered as "introduced species," but I haven't heard anything like that in case of scarab beetles in the U.S. Such things happening in Japan, has been a problem to agriculture they got more more and more pests to deal with... (messed up) Parents of those offspring were illegally brought in, so all their offspring are illegal as well. Origin of those offspring matters greatly.
  7. JKim

    Light Traps...? Help...

    I understand you would like to collect as much beetles as possible with low cost under $100, but that is rather ridiculous, as smaller sized, non-plugged light sources just CANNOT produce enough light or UV to attract various and numerous numbers of insects. SO it is quite difficult to attract and collect any larger sized scarabs you might want to see UNLESS you light it up next door to your beetle neighbors. Better equipment (with substantial knowledge, of course) = better result. Light trapping isn't just an easiest way to collect insects. IT REQUIRES A HUGE KNOWLEDGE. Those "insects" bumping onto your windows at night is probably, very likely, may beetles in subfamily Melolonthinae. Strategus species do not usually fly to bump into your windows several times to make a stressful noise to human ears. Smaller beetles fly a lot, compared to larger beetles, simply because of their lighter body weight. You don't hear a thing when Dynastes tityus flies to your light trap set up. They barely make any noise when they drop onto a ground. This was the case for D. grantii as well, where we observed 240+ specimens of them, very few actually landed on the setup (mostly couple yards away from the setup). Those two species of Dynastes, rarely ever lands right next to the lights. They usually only land nearby. Xyloryctes thestalus also does not seem to make much of noise either (probably because they are lightweight, and make less noticeable noise), however, they do come to right next to the lights. If you find a great location, sure, a battery powered non-LED lanterns work okay. I cannot seem to find it on Amazon anymore, but they used to sell Energizer branded lantern for less than $20. Dr. MJ Paulsen in University of Nebraska State Museum (Lincoln, NE, USA) used to tell me he was able to collect numerous numbers of Lucanus elaphus, in where they occur. HOWEVER, this person is a Lucanidae specialist. He is not an amateur. Another option for you is what I has when I was still a high school teenager, cannot afford any thousands of dollar equipment I currently have. I collected quite number of different species of scarabs with this, and had no issue of finding beetles which occurred in my neighboring areas. Result was excellent. https://www.ebay.com/itm/270415596824 Buy two, and replace one with UV light tubes, to use main light + blacklight. Or just go ahead use two blacklight tubes. Also, alternative suggestion for you is to just walk or drive around street, gas station, tennis courts, or golf courses at night (not camping!). If you ever go to private properties, make sure you contact the owners. If you talk them out about it, they will usually gladly allow you to be in there. Every time I go collect insects in forest, reserved areas, private properties, I always, ALWAYS, greet and asks owners or neighboring campers for an understanding. They will usually accept.
  8. It seems it depends highly in each individual from couple weeks to more than a month. Each species, each individual seems to have varying time spent in pupal cell as prepupal stage... If I remember it correctly, I think My D. tityus specimens have spent somewhere about 3 to 6 weeks after completely constructing a pupal cell until they pupated.
  9. JKim

    A start of Dynastes tityus season

    This was rather an unexpected collection, didn't actually meant to collect D. tityus. I'll probably start collecting D. tityus near new moon this year. Maybe second week of month or so. I do aware couple females are recorded in this year in Louisiana, so yea, I'm sure they are about to start flying around. Just not the peak season yet!
  10. JKim

    Dyscinetus morator eggs

    For those who do not aware of what Dyscinetus morator looks like: https://junsukkim.wordpress.com/2016/08/03/dyscinetus-morator-fabricius-1798-coleoptera-scarabaeidae-dynastidae/ This is what they look like. This species is very abundant where they occur. As a common morphological characteristics of tribe Cyclocephalini, Male has thicker frontal tarsi while females aren't. That is one quick way to differentiate males and females. I observe them in great number in UV light traps, and even from street lights. The largest number I ever counted was 400 in a single night from a street light. They seem to be more abundant near people where lawn is taken care without any pesticides, probably because they are the lawn pests...😅 I just decided to dump couple pairs into 16oz takeout plastic containers with some substrate, and they laid quite number of eggs. I'm thinking about rearing them and maybe go for couple life cycles to see what it looks like. Here is an image of eggs: It was quite interesting to observe several eggs laid in a single spot. This wasn't the only one however. There were couple more other spots with several eggs laid together. I first noticed from outside of a container that I could easily see several eggs cluttered together, so I decided to open up the container to see what's going on. Maybe female just lay whole bunch of eggs in a single spot where it seems to be safe...??
  11. JKim

    Carabus auratus

    Fortunately enough, we don't only have rearer/breeders in this forum, we don't usually discuss about what is right and wrong. I don't think I've ever seen one. Also, many hobbyists these days eventually major in entomology or something related, so it seems the views on killing insects are becoming less difficult topic to being around us.
  12. My first specimen of Dynastes tityus collected in Louisiana this year. They appear in Louisiana starting the first or second week of May, but their peak active time is around mid-June to mid-July. The biggest number collected in a single night in Louisiana with my colleague was over 15 specimens. I'm hoping to see that miracle again.
  13. Strategus antaeus male, collected couple weeks ago in Louisiana. Their peak season is about to slow down, and of course, a seasonal rainfall just started. Research on Genus Strategus occurrence in Louisiana can be found in ResearchGate and Academia, if interested: https://www.researchgate.net/publication/326583796_THE_GENUS_STRATEGUS_KIRBY_COLEOPTERA_SCARABAEIDAE_DYNASTINAE_IN_LOUISIANA https://www.academia.edu/37034989/THE_GENUS_STRATEGUS_KIRBY_COLEOPTERA_SCARABAEIDAE_DYNASTINAE_IN_LOUISIANA
  14. JKim

    Carabus auratus

    I majored in entomology, and focused on scarab taxonomy. I kill thousands of insects for research annually. Yes, I always, and ALWAYS receive message about "why do you kill them?" I preserve them to study their morphological characters in the best-possible condition. Old and dying specimens with no characteristic features preserved, has less worth of studies. I study and publish my research to scientific journals to share the information I found with others. Without biological taxonomy studied on any living things, NO FURTHER STUDIES can ever even be started. Our common sense of differentiating dogs to cats first started with taxonomy. Taxonomy is the very important and very first step in biological studies. Killing jar is to kill insects in field, to avoid any potential damages to its specimen. It is to preserve it to the very best condition ever since the sampling occurred. Let's say... you collected a butterfly, and kept it in a jar. Butterfly will flap their wings to escape until you take it home, and kill them. It will damage all their wings, and you may see broken pieces of wings on bottom of a jar. Do you think you can study based on the puzzle-like broken insect specimen? Possible, but very difficult to do so, as it is not man-made object. You may not be able to perfectly put pieces together. Well, of course, I don't kill insects "just for fun." I don't even kill mosquitoes in my room. If they come in, I catch them and let it go outside. I don't just kill this and that insects. I only kill and preserve scarabs, and sometimes, I collect other insect groups for my colleagues in different regions. This is my scientist-viewpoint. For collectors (who usually purchase, and avoid collecting himself), for artist, they all have different viewpoints. We can sometimes work together too, so I don't say a single thing about what they do.