Changing Planet

The Rare Primitive Crane Fly and the Inelegancies to Find It

(Patagonia’s Untold Stories)

While packrafting the southeastern edge of the Northern Patagonia Ice Field along Chile’s largest river, the Baker, in search of primitive crane flies, Anand Varma and I came across an exciting find.

In a fragmented location only accessible via water, among a lichened-covered forest, we discovered a single wing of the genus Neoderus adhered to the underside of a leaf, between the Northern and Southern Ice Fields. Yes, a single wing is a fantastic find when it comes to primitive crane flies.

Most likely you have never heard of them and that is because primitive crane flies are considered to be one of the rarest groups of flies in the world and only a handful of people have been able to collect them. With only one specimen ever collected in the late 1800s in the southern Chilean fjords, the genus Neoderus can be considered the rarest of all primitive crane flies.

During my last expedition in 2015 I secured four flies, the first and only specimens collected of this genus since its discovery.

stacked image of a Female neoderus sp. hanging on a Nothofagus sp. twig. Photo by R. Isaí MAdriz

With colder temperatures marking the last chance this year to find this rare group, I set off once again to complete what Anand and I started. I decided to target the locality where I found a lone wing two years prior. I loaded my backpack, took my hiking poles (or as my collaborators call them, “my gimpy sticks”, due to the frequency of my ankle injuries) and limped into one of the most pristine creeks I have seen. After a 1100ft climb and bushwhacking across dense forest I arrived to the location.

Upon arrival I removed my hiking boots and proceeded to relieve my ankle pain in the glacial creek. Soon after, I unpacked my 60+lb backpack and identified the perfect configuration for my tree tent, which was strategically located near the creek 6ft above the ground. Below my tent, I set up my “field laboratory” consisting of a stereomicroscope from the early 1980s with generic USB lights secured by duct tape and powered via rechargeable solar battery. This arrangement allows me to collect aquatic insects and immediately identify any promising specimen under high magnification. The dream camp set up of any insect-loving seven-year-old!

Not only does my tree tent provide a dry refuge from sudden rainfall, characteristic to this area, but it is also the perfect barrier from the numerous avian intestinal discharges I am constantly being bombarded with by territorial birds.

With sunset approaching, I decided to have something to eat. I packed all the necessary gear for this short expedition but managed to forget food.

Loose in one of my backpack’s hipbelt pockets, I found a handful of stale trail mix (from sometime since September) and a piece of chocolate.

Lack of aesthetically pleasing or “proper” camping food, seem to be a trend for this site. A couple of years ago, my food bag punctured and got wet while reaching this exact location, leaving me to consume lukewarm soft cheese, soggy bread and broken crackers accidentally blended into a paste-like consistency. Read more about this particular story here.

This time was no different. As I searched the creek looking for the unknown larvae of Neoderus and other aquatic insects, I intentionally separated the largest common stoneflies. I later proceeded to make my “back-country specialty” of au naturel stonefly and stale raisin kebabs on endemic southern beech twigs, complemented with all-you-can-drink glacial melts. A true delight!  My other options were: 1) No food or 2) Soggy almonds and common black fly larvae, but the latter are quite slimy and a last resort among the edible insect choices on my list.

With hunger “satisfied”, I set up my blacklight a few feet away from the stream.  While waiting for insects to be attracted to the light reflected on a white sheet, I set off into the dark forest in true nerd-like fashion with my rain pants synched up to my mid abdomen, my cuffs tucked into my socks and sporting my night vision goggles in search of nocturnal six-legged gems.

stacked image of a female Neoderus sp. resting on Nothofagus sp. twigs. Photo by R. Isaí MAdriz

Throughout the night, the UV light attracted all sorts of insects, including Darwin’s beetles, half-inch-long parasitic wasps, caddisflies, moths and many midges. Alas, no Primitive Crane Flies.

Soon after midnight, rain drove away most of the insects and continued to pour until mid-morning. With sunrise approaching and a sufficient few hours of sleep, I climbed out of bed, ate a forgotten stonefly still in the “food” container and the piece of chocolate for breakfast, put on my rain gear and limped across the forest in search of the insect I came for.

After wading through the creek for a couple of hours with no success, I decided to direct my attention to the numerous fallen trees around the forest. Interestingly, a large decaying tree still hangs 8ft high over the creek. Underneath, a Neoderus female. After squealing like a piglet for some time, I proceeded to secure the specimen. Crane flies in general are well known among taxonomists to lose or detach their legs at will. This particular female had all six legs still attached, making it the only pristine specimen in the world.

With my precious find, I headed straight back to camp. Once there, I frantically packed it all up and awkwardly limped back to my vehicle a few miles away, all the while juggling the specimen, my heavy backpack and my “gimpy sticks”.

I drove eight hours back to my headquarters and proceeded to photograph the female. After a long and continuous photography session of 48hours the female finally died, but not before yielding the photographs above. These, along with one poor quality image from 2015, are the only photographs of a live Neoderus in existence.  A true reminder of the biological jewels awaiting discovery in the vicinities of the Patagonia Ice Fields.

R. Isaí Madriz identifying aquatic insects in the field. PHOTO BY R. ISAÍ MADRIZ

*The Neoderus specimen in the photographs above belongs to a new species of primitive crane fly. A scientific (peer reviewed) publication is in process to formally describe this species.


Follow Isaí Madriz on Instagram, Facebook or Twitter.

Equipment used for this nine month project is courtesy of Fulbright, National Geographic, Iridium, Alpacka Raft, Aqua-BoundBoo Bicycles, Kokatat, Seal Line, Osprey, TentsilePatagonia, Voltaic & Jax Outdoor Gear.

Dr. R. Isaí Madriz is an entomologist and zoologist with expertise in freshwater aquatic insects of Patagonia. As a Fulbright-National Geographic Digital Storytelling Fellow, he is telling the story of deglaciation of the Northern Patagonia Ice Field, focusing on its vanishing aquatic insect diversity through images and stories of exploration, science and human connections. He combines hiking, bikepacking and packrafting to transect unexplored areas and secluded fjords in search of some of the rarest insects on the planet. This low-carbon footprint approach utilizes renewable energy sources to capture never-before-seen footage of remote glacial outlets and hidden valleys of wild Patagonia. Madriz is documenting the largely unknown endemic aquatic insect fauna of this vital region before Chile’s Aysén region’s biodiversity is transformed forever.
  • Ulysses Diaz

    What an incredible journey to find a living Neoderus. I can only imagine the piglet sounds that came out at that moment. Much luck and safe travels in that incredible majestic land!

    • Isaí Madriz

      I must confess I did sound like a piglet. Only way to find out is for you to come down here and come along in an expedition 😉

  • Kathy Burch

    Congratulations, Isai — what an accomplishment!

    • Isaí Madriz

      Thank you Kathy. It has taken me since 2013 to acquire a good picture of this rare species.

  • Brittany Clark

    All six legs! That’s awesome. I can’t wait to read the species description. I hope that you will have luck in locating a male. As always, the images are top notch. It’s so important that these stories are shared through outlets like NatGeo. Educating the public about finds like these is what drives conservation forward. Great job.

    • Isaí Madriz

      Tanks for your response Brittany, I did find a male bur he did not survived the journey to my photography headquarters 🙁

      The insect (male and female) live coloration soon fades after death, thus I only depicted the surviving female in the story above for you (the reader) to have a clear idea of what the live insect will looks like 😉

  • Gunnar Mikalsen Kvifte

    I looked at the thumbnail picture and thought right away that it was a painting – it blew my mind that they were photographs. The coloration is just so unreal!

  • Víctor romero

    La publicación es muy buena te da a conocer especies nuevas y como se desarrollan de forma natural en su ecosistemas y además te da a entender como viven y como es su hábitat donde avitan esos animales.

  • Renata Guizar

    Me gustó mucho esta entrega.
    Cómo redacta y plasma cada asombroso descubrimiento.
    Las fotografías son extraordinarias, inmejorable calidad.
    Gracias NatGeo por hacer todo por descubrir nuevos mundos.
    ¡Felicidades a este gran equipo!

  • Stephanie Lindsay

    What an amazing and beautiful find! Congratulations Isai!

  • Isai Moreno

    Muchas gracias Tocayo, y también a National Geographic por compartir esto. La narración detallada Me hizo sentir que estuve viviendo contigo esta fabulosa experiencia!!
    La información tan importante que compartes es única, se percibe que esto que haces lo disfrutas y nos haces disfrutar contigo.
    Felicidades por tu entrega y entusiasmo!!!
    Estaré al pendiente de tus publicaciones . Son FABULOSAS!!!

  • Fernanda

    Es muy interesante saber todo lo que se vive para conseguir esas imagenes y especimenes, se puede llegar a creer que es algo facil y con tus narraciones nos damos cuenta de que es todo lo contrario.
    Buen trabajo como siempre Isai.
    Las fotos estan super chida.

  • Alex Mykris

    Great story Isai, including all the struggles and victories really brings life to the whole experience! Sounds like this has been a bit of a trying expedition but well worth it.

  • Carlos Mdz

    What a task to find this specimens and your ability to create this photography is remarkable!!

  • Pilar

    Amazing work! I’m looking forward to one day reading your autobiography.

  • Mariana

    Hi my name is Violet and I am 9 years old. I liked that you slept in a tent and I would like to do that too. I want to have a lab like you and I want to find a bug that no one in the entire world has found.

    • Isaí Madriz

      Hi Violet,

      Thank you for writing!

      You should definitely have your own lab! To start out all you need is a magnifying glass. If you can, take pictures of bugs and I can help you identify them. Who knows, you might find an insect no one in the entire world has found 😉

  • Miguel Guizar

    Thanks Isai and NatGeo! Great things you always discover and show us.
    And with the reading and pictures, it felt like been there.
    Keep the amazing work!

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