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JKim

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About JKim

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    L3

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    https://junsukkim.wordpress.com

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  • Gender
    Male
  • Location
    Louisiana, USA
  • Interests
    Scarab Taxonomy

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  1. JKim

    Chrysina beyeri

    @MasterOogway Chrysina gloriosa is very easy species. NO WORRY AT ALL!! Adults feed on fresh juniper leaves, and they love it! they lay A LOT of eggs. Survival rates are also high. Use regular substrate, nothing special, no additional food sources required. VERY EASY species. Takes less than a year to emerge starting from eggs.
  2. JKim

    Lucanus placidus Say, 1825 - Male

    @davehuth Yes, the female I collected last year was already gravid. Of course, there is no way telling whether it is mated female or not, but I just dump her into a setup and found couple eggs / larvae afterward. The reason I set her up was that (1) I collected a specimen in late May (2018) and since this species seems to be out in late April to early May, I assumed it has already mated by the time and (2) the specimen was not in a good condition (some scuffs/scratches entirely), meaning it has been some time since it has emerged. But... this is just "a guess," and proven to be correct that is has mated previously.
  3. I collected a 30mm male of Lucanus placidus Say, 1825 couple days ago. I found couple females in the past, but this is my first male. It seems they can be found in more areas than any other Lucanus spp in the US, but rarely collected in southern states. I haven't seen much images of captive bred specimens.. Could it be because it is rarely encountered? They are not a difficult species to rear at all. I currently have 10 larvae doing very well, and likely to emerge this summer.
  4. JKim

    yellowstone national park

    I do not aware of any large-sized scarabs in Wyoming... You should keep an eye out for park rangers, if you are collecting inside the boundary of Yellowstone National Park It is ILLEGAL to collect organisms in national parks without a proper permit. Right outside the boundary should be OKAY without a permit. Different parks and forests have different regulations and restrictions. You would not want park rangers to point a gun at you, right?
  5. JKim

    Polyphemus moths

    @Bugboy3092 Antheraea polyphemus is known to feed on variety plants including American elm, beech, birch, grape, hickory, honey locust, lemon, maple, oak, pear, plum, walnut, etc. Different reference always tell you different things. However, that does not mean they are all fully compatible with your caterpillars. Some of these can be primary preference, while others are secondary preferences (because primary preference is just not available). If you personally collected the female, and if you know what plants were nearby, try feed THAT plant instead of trying a random one of so many known host plants. I attempted rearing Actias luna, Dryocampa rubicunda, Eacles imperialis, Automeris io, etc. which are known to feed on red oaks, did not actually fed on oak at all and just died in hunger. So what I think is that there are some different host preference over where the original specimen (or parent specimens) are collected. Say... If you collected a mated female in a maple forest, then the caterpillar's primary preference would potentially be maple and similar species, not pine or oak. Just my thoughts over my experience... I tried feeding different plants (red oak, sweetgum, pines) for Actias luna (caterpillars from a mated female I collected), but caterpillars only fed on sweetgum, which was interesting. The mated female is collected in a pine forest with some sweetgums and oaks were available here and there. The exact location where I found the mated female had sweetgums all over the place. SO... I think that's why the caterpillars only fed on sweetgums, instead of pines (or oak).
  6. JKim

    Catching tigers

    @The Mantis Menagerie In that case, you should pour only a tiny bit of wine into the trap, and you have to pick up collections daily before the noon (to avoid heat) to keep them all alive. All my collections were alive when I picked them up. I don't recall collecting any of them in May, but started to be collected in June in Louisiana.
  7. JKim

    UV LED flashlights

    I just happened to read this post while searching other stuffs, and decided to participate in this old post. Any light can attract insects. Smartphone LED Flash can attract insects, just the brightness of the phone screen can attract some insects. However, that's just couple specimens right next to you. You won't be able to ACTUALLY attract anything far from your location. LEDs that states it is a blacklight is usually a fake, especially in forms of flashlight. They are just blue-purple colored LED bulbs, imitating the blacklight. The BLACKLIGHT is not about color of light. It is about the wavelength it emits. If I remember correctly, anything that emits wavelength between 200 nm to 400 nm are considered UV, and the wavelength that attracts most insects is somewhere 360 nm (can't remember the exact number). LEDs generally do not emits any UV at all, so using an LED light to collect insects is simply a waste of money. Now days, there are some insect attracting LEDs available in the market, but according to what I read, it is so terrible compared to light traps used with HID lamps. SO I think an insect happened to fly around that exact spot sat on the light and sheet, instead of actually attracting insects far from the trap. If you cannot afford HID lamps, portable generator, and all other necessary setup, just try using battery-powered fluorescent lamps with blacklight tubes replaced. Use that in heavily forested land where no lights are within the radius of a mile. That should do so much better than that 100-leds flashlight you have. https://ebay.com/itm/270415596824 This is not a bad choice of selection. I used two of this with one replacing the tube with blacklight tube. This is battery operated, and very light that you can carry in a hand or in a backpack.
  8. JKim

    Catching tigers

    @Dak.the.bug I'm sorry for the delays. I don't know if iNaturalist is a reliable source to see how many species occurs there, especially for Cicindelinae, or many potentially confusing groups. There are many professionals, but there are many crappy amateurs too, such as ones stating "I'm the first one to publish this record at here!" In case Cicindela spp. you can hardly ever collect ANY with pitfall trap. Try get a butterfly net and go for it! Go search the sand marshals, bayou, or any water during the day. The most active time of the day is probably when it is hot hot HOT!! They love to run and fly near there nest. Probably sometime between 11AM to 3PM. Attached is an image of Cicindela chiloleuca Fisher, I collected near an old salt field in South Korea. Many species in Cicindela, including C. scutellatis seems to love the salt marshes. @The Mantis Menagerie I haven't collected Tetracha for years now. Probably a decade? They were never my favorite group, so I only collected couple times, and gave it all away to a colleague. The habitats I placed traps were near water or forest with river next to it. I don't know the details of Cicindelinae, but it seems there are different group for habitat. There are some species that can be found near water, while some species can be found without water present nearby. I happened to have some experience in collecting four or five species of Cicindela spp. in South Korea, and one found in heavily forested mountain (without any water nearby), while all others were found in salt marsh. The image attached above is one of it, collected at an old salt field. They never overlapped in habitat wise. (this is what I experienced from only couple collection trips, not multi-year researches). Unfortunately, I have no pictures of pitfall traps still alive in my computer. All I use is a small cup (but in depth of over 2 inches) with little bitty of cheap red wine ($7-10). Don't have to pour in a lot of wine. Just a sip of it. like quarter inch depth of wine in a cup. If you are setting and picking them up daily, then yea. If you are picking them up every once in a while, then you probably need little more than a quarter inch of wine, but would not recommend it. Set them up where sunlight is fully or at least partially available.
  9. JKim

    ID this please woah

    To identify any insects, no matter in what order they are in (Lepidoptera, Orthoptera, Coleoptera, etc.) dorsal plate is definitely the least one shot needed. Any image like this, there is no way to identify it to species level, but Cetoniinae.
  10. JKim

    Light trapping

    Thanks! Since your location in member information section does not show where you are from, hard to guess where exactly you lighted up. One of the important factors to consider are: preemptive and bright and long lasting lights, especially if you are doing it near many other light sources. Insects tend to fly to the very first lights they see, and then they just won't fly to the other lights. So lighting up starting early evening is highly necessary. I light up an hour or even two hours ahead of sun goes down completely. Also, if you are light up near the gas station, you just have to have something so much brighter than gas station lights. That's kind of obvious, right? Long lasting is important because each species are time-specific. I'm sure you are aware of it, if you have been light trapping all night long. Insects collected near city are completely different from insects collected in woods because people these days plant non-native plants here and there, you can actually (and potentially) find many different kinds of species compares to deep forested area where there is primary species of wood (like pine) occupies majorly. (may vary per location, of course) Thanks! Haha I've been collecting since I was in elementary. It has just gotten more hard-cored, especially when I started light trapping. I don't do any live insect donations to insect zoos, because it seems they can only "buy" from a person with tax ID number as a business owner here in Louisiana, which is weird... There is no "professional seller" of live insects anyway in the United States other than maybe someone like Peter Clausen who regularly carries insects and beetles as items. Yes, this set up is not very affordable kinds. But if you are highly interested in collecting, this thing can pay you off with experience, knowledge, and research materials, and maybe some extra stuffs you can sell to others who are interested. Anything that I'm not interested, I donate them to my colleagues over the world. I donate some to institutions as well. And only portion are being sold over eBay, InsectNet, and some others. Thanks! As long as the battery capacity is large enough to run for more than four to five hours, sure yea! It is good. I heard many stories from researchers and colleagues who went oversea to unoccupied location where you just can't buy or take generators with used car batteries to light trapping. It works, except high wattage like 1000 watts may not work because of the battery power, I'm guessing. It should work okay for anything not too high like 1000.
  11. Rocky mountain has great numbers of Lucanid beetles, but... nothing large if I remember correctly. I don't recall Lucanus spp. occurs in California, does it? Or anything large like Dynastes, Megasoma, or Strategus?
  12. JKim

    Catching tigers

    What tiger beetles are you collecting? Different species, different methods available. if you are collecting any Megacephalini, then pitfall trapping works great. They are flightless. I once collected over 40 specimens of Tetracha carolina in a single day with two small pitfall traps. Anything Cicindelini, you will have to run around with butterfly net, at least 3 ft long or longer. Anything too short, they will quickly fly away when you make an approach, especially when you are not very experienced in collecting tigers. I'm not a serious tiger beetle collector at all, but up until now, I've collected: Tetracha carolina, Tetracha virginica, Cicindela repanda, Cicindelidia trifasciata, Cicindela sexguttata, Ellipsoptera lepida, ... It looks like there was some revisions in genus Cicindela as Bugguide has changed whole lot of things there. Both T. carolina and T. virginica can be collected with pitfall and light traps. All others, I collected with light traps and butterfly nets.
  13. Season is about to start down here in southern states, and I went out to see what's out right now. This picture illustrates the light trap set up I have done with a colleague couple nights ago. These are actually a combination of two set ups: 1. one 1000 watts metal halide with ballast and one 250 watts metal halide with ballast and one 15 watts blacklight operated by 2000 watts generator 2. one 400 watts metal halide with ballast and one 15 watts blacklight operated by 1000 watts generator There was three sided standing sheets inside a triangle of three lights with blacklights here and there. Many different species of Scarabaeidae (Melolonthinae + Dynastinae), Saturniidae, Erebidae, Diptera, Hymenoptera, Orthorptera, Hemiptera, Megaloptera, Neuroptera, etc. etc... are observed. No larger sized scarabs yet, but found couple of interesting, rather uncommonly seen species of Melolonthines. I'm excited for this season!! Any heavy (actual) collectors in this forum? (not collectors as "buyers")
  14. JKim

    Wild collecting Dung Beetles?

    Yes, those attached images, as [Goliathus] stated, are beetles in family Troxidae. They are also one of the carrion/feces attracted beetles. There are so many different beetle species attracted to feces and dead animal / plants. Different species attracted to feces of many different animals. Can be quite confusing when their sizes are small.
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