Diario del proyecto Odonata of Oe-Cusse

Archivos de diario de marzo 2019

02 de marzo de 2019

The return of the Neurothemis

Hours before catching my flight back to Dili (Capital of Timor-Leste) to visit family and stock up on some supplies, I saw them, Neurothemis ramburii, one of the skimmers/grasshawks that I truly enjoy photographing. Unfortunately I did not have my camera, but have taken a GPS reading and added a point into my next site to photograph. The weather is really good, the humidity is off the roof but given that sun is rising slightly earlier I can get a solid 1:30 of photographing before getting into the office and do my overlords bids.

They are back in Aosnak. They appear to prefer the pools over the flowing water.
https://www.inaturalist.org/observations/20936155
https://www.inaturalist.org/observations/20936159
https://www.inaturalist.org/observations/20936162

Publicado el marzo 2, 2019 02:04 MAÑANA por ruidasilvapinto ruidasilvapinto | 0 comentarios | Deja un comentario

05 de marzo de 2019

A decent (posed) photograph of Zyxomma obtusum

Finally managed to get a site with enough Z. obtusum to collect, they are somewhat hard to photograph perching as I have not been able to see it yet. I have uploaded a dead posed Zyxomma. I'm somewhat unclear whether it will turn out to be Z. obtusum (a bit unclear now given that I have not had much experience with the species). The photographed one was caught 6:20 AM before sunrise, I have seen them flying at dusk before sunset. They are active for little over 30 minutes and are very active fliers. I have never seen one perching.

https://www.inaturalist.org/observations/20940239

Publicado el marzo 5, 2019 11:57 MAÑANA por ruidasilvapinto ruidasilvapinto | 0 comentarios | Deja un comentario

08 de marzo de 2019

Preparing to describe a new site

As you guys may have noticed, there were several significant records from a site “Oebaha”. A recent collection by a friend yielded many species, which include Camacinia gigantea (first record of the species in Oe-Cusse), Anax guttatus, Tramea stenoloba, Zyxomma obtusum and a very interesting Gynacantha.

Most of the times I do the collection myself when I cannot photograph them in the wild, but lately I have been given specimens collected by friend and family that check some of the pictures I post on Facebook. Few people know and/or realize the work required in preparing a visit to a new site. My steps tend to be always the same, first find a good local informant, nothing beat local knowledge. I have found that most of the times either children or >60 year old informants are the best. Children are great for Damselflies and >60 for anything crepuscular.

After having a good key informant I try to understand beforehand what kind of vegetation I’ll encounter, try to estimating travel times (by motorbike/car or by foot), prepare the main camera body (with macro lens), prepare backup camera body with a telephoto and some extension tubes, take GPS, take my “point and shoot” camera with built in GPS and GLONASS. Then comes preparing the first aid kit, which is followed by preparing what I’ll end up using as a Kill Jar, some sample jars, the nets.

Having a Key informant is crucial as a lot of the sites with water are under specific traditional natural resource management practices, with a range of taboos put in place. Thus far I have not been denied access to a single site after explaining what my nets where for. There are many restrictions when it comes to harvest of freshwater prawns here. Because my Meto is fairly poor, and most people here do not speak Tetun no Portuguese, I rely on the first pictures in my SD card (of different Dragonflies) to show what I’m after to photograph.

But before all of that and after preparing what will eventually become my kill jars I have a look at different military maps (Indonesian, Portuguese, Australian) to check contour lines and set treks and/or quadrats depending on what I hope to photograph and document, this is followed by looking at some of the aerial photography and high resolution satellite imagery of the area, by the time this is done, I’m exhausted and usually sleep less than 7 hours before traveling.

For the Oebaha site I’m blessed with having a good friend (Custódio Bobo) whom I’ve worked with in Fisheries Management issues, he has retired and moved back to be with his wife and tend after the gardens and his paddy rice fields, he is an expert in Anax and has an amazing knowledge of habitats and behavior. His son in law, Jeffrey, whom I work with, is fairly interested in odanating and is always keen to join and help me out. He is particularly good as posing dead specimens in the most natural of ways. Borju a young man whom I have recently met, although a trained accountant has not managed to find a job but is very keen to join and learn he is particularly good at netting and has the eyes of a falcon and is as proficient in the use of a net.

Publicado el marzo 8, 2019 11:40 MAÑANA por ruidasilvapinto ruidasilvapinto | 0 comentarios | Deja un comentario

10 de marzo de 2019

Site description: Oebaha

Location: Suco - Bobometo
Site name: Oebaha, Oelpanaf


Fig.1-Oebaha

How to get there?

This site is located some 18 km from Pante Macassar town centre (BM STA 0 000) located in front of Hotel Inur Sakato. You’ll need to get out of town via the recently built Samoro-Pasar Tono Market Road, pass Nuslau and take what will hopefully become the Tono Market – Oesilo National Road. You’ll need to cross two (2) bridges, Kinloki and Abanal bridge over tributaries of the Tono River. The site is fairly close to the second bridge, however during the rainy season it takes you anywhere from 60 minutes to 90 minutes to get to Oebaha. Some 550 meters from the second bridge’s end (abutment towards Oebaha) you’ll have to turn right as if going toward the neighborhood known as Faut, as you get to the river known as Noeana (little river) a tributary of the Tono River, you’ll have to hike 600 metres up the river and get to the margin to your left, there you’ll see a small drainage canal and a fairly visible landmark (a well). This entire area roughly 1.5 hectares is known as Oelpanaf (Well).


Fig.2-Oelpanaf, shaded by a Samanea saman

Where does the water come from?

There is a slight depression and a small size pond is formed here during the rainy season and the lower parts of the depression retain water all year round. Water flowing from the surrounding steep hills drains into this site, which acts as a retention basin, retaining also waters drained from rice field located in the flatlands next to it. All this water then drains to the river by means of an earth dug canal.


Fig.3-Water Canal

Vegetation

The less sheltered and more disturted flatlands have some trees which include the schleichera oleosa, the palm Borassus flabellifer, and some scattered Zyziphus. This site has been taken over by Bellyache bush (Senna alata), some candlebush (Senna alata). The more sheltered and protected steep slope have Pterocarcus, and a small trek is available from the well all the way to the ponds far edge through this more shaded and protected area. Several flowering plants where photographed here.
https://www.inaturalist.org/observations/21075949
https://www.inaturalist.org/observations/21075842
https://www.inaturalist.org/observations/21075841
https://www.inaturalist.org/observations/21075839
https://www.inaturalist.org/observations/21075838
https://www.inaturalist.org/observations/21075836
https://www.inaturalist.org/observations/21075405
https://www.inaturalist.org/observations/21075404
https://www.inaturalist.org/observations/21075142
https://www.inaturalist.org/observations/21074403
https://www.inaturalist.org/observations/21074400

What can you expect to find:

  1. Lestes concinnus (?) (?)(margins of the pond)
  2. Ischnura senegalensis (margins of the pond)
  3. Pseudagrion microcephalum (?)(margins of the pond)
  4. Pseudagrion pilidorsum (margins of the earth canal)
  5. Anax guttatus (?) (caught in the morning 10 am flying at the water edge near shaded areas with Borassus palms)
  6. Camacina gigantea (a fairly common species in the pond)
  7. Neurothemis ramburii (photographed near the well)
  8. Orthetrum caledonicum (?)
  9. Potamarcha congener (pond)
  10. Zyxomma obtusum (caught at dawn flying in a shaded area earth canal )
  11. Gynacantha sp. (caught at dawn)

I have looked at High Resolution Satellite imagery for this location (1 pixel = 10cm) and this small depression was not visible as the image was taken during an El Nino Year. The only thing you can only see a non-farmed area (the pond) covering some 1.2 ha in total. If you were to look at Google maps you would think I made a georeferencing mistake, however I photographed using my Olympus TG4 with GPS and Glonass enabled, took my handheld GPS (Garmin etrex 30x). If you look back at sat imagery from 2011 and 2016 you’ll be able to tell it just.

This is a fairly good site, many different species can be seen here. This was the site where I made my first record of a Camacina and of a Potamarcha . I was bitten by a Camacina for the first time here. I did not know how aggressive this little beast can be. This would be a perfect place for a picnic with friends, although there are no waterholes nearby big enough for a swill. The surrounding hills host, as I have been told three different species of orchids, which are now in bloom. I’m looking forward revisit this site.

Publicado el marzo 10, 2019 01:11 MAÑANA por ruidasilvapinto ruidasilvapinto | 1 comentario | Deja un comentario