Open issues: Bats in Indonesia, records that require confirmation

Pipistrellus tenuis
Pipistrelles using a QCF part between 45-49 kHz (even at very long pulse durations) have now been found in Borneo, Sulawesi, Malaysia and on Bali. They seem to be absent from west-Java. It is quite urgent that this species is finally confirmed. The species is extremely common in Makassar and probably elsewhere in SW Sulawesi.

Pipistrellus minahassae
Whoever is going to Manado and for whatever purpose, please take a detector with you and record some pipistrelles. To start with, just knowing what frequency they use would be very interesting.

Myotis hasselti
A species of trawling Myotis occurs above nearly every pond or river in Java and requires to be confirmed as M hasselti, or something else.

Myotis moluccarum
There is a Myotis species hunting above sea in west-Papua. It probably is M moluccarum, but it would be good to be sure and watch out for Myotis hunting over sea in east-Sulawesi, Halmahera, Ambon and so on.

Mormopterus spec
Along the coast of west-Papua at least one species of Mormopterus occurs, which is probably not M beccarii. It would be interesting to know the species. Check caves near the coast.

Philetor brachypterus
If anyone ever happens to catch this species, please record its echolocation. I want to know if this is indeed the bat that uses 31 kHz in the open and 34 kHz in dense environments. There is no pattern in the habitat preference of this species.

Taphozous longimanus
Where is this bat? I have never been able to find it.

Scotophilus celebensis
I recorded Scotophilus like pulses, sweeping down to 30-31 kHz (much lower than all other Scotophilus species), but surprisingly only inside forests. It would be very nice to catch this bat to be sure about the ID.

Scotophilus kuhlii
Does the Javan-type really never occur in Malaysia and further up north? It would be interesting to know if you ever record pulses with QCF below 38 kHz. The javan-type frequently alternates between 40-39 and 36-34. Extrem narrowband signals are not necessarily the lowest in frequency in this species!

Still, the echolocation of all species in this genus has to be sorted out. I have so far rarely come across this genus.

Easy to score:
In this cave on Flores: S08°28.597′ E119°53.831′ one can easily catch a horseshoe bat using 78-80 kHz whose identity is unknown. In the same cave I recorded a Hipposiderid that was very likely Hipposideros sumbae! Higher up is also a colony of T melanopogon; a good chance to collect their pellets to find out what they eat.

Flores, forest trail: From Labuhan Bajo take main road east to Roe and pass the village. The road still goes up. When you see a small warung left you will also see an asphalt road going right. Take this road until you see an abandoned hut (still in the forest) to your right. From here there is a small path that follows the southern edge of the forest, walk about 100m and put up the net. GPS: S 08°36.143′ E 120°01.207′
On this trail you can catch an unknown 92-93 kHz horseshoe bat. If you catch Rh. affinis (which also occurs in the area) keep on catching. The species is probably smaller.

Giant Hipposiderid in Lore Lindu, Sulawesi, unlikely to be H dinops/pelengensis/diadema, very tentatively identified as H lekaguli (not at all known to occur in the area). Its frequency is extremely low (44 kHz), which is much lower than any Hipposiderid ever recorded in Indonesia. Location: GPS: S01°24.840′ E120°17.611′. Can be reached from the village Wuasa. Follow trail from sekolah SNP, trail joins main river. If you aren’t sure ask for a structure similar to a swimming pool “kolam”. If you reach this, go back some 200m and follow the river bed left, the trail is to your right. The bat crosses the trail frequently, but also flies around it. Deeper in the forest from here I also recorded S celebensis, but they fly high.

Small horseshoe bat Bali. Location: Lake Tamblingan. The bats follow the main road, even fly through the archway at about 20-30cm height. Species is probably Rh pusillus, but there is a small chance to find Rh canuti. One can start catching later at night when very few people are around. The forest is sacred, so be careful what you tell the locals.