The Weird and Wonderful Insects of Borneo.

Even though it was a birding trip to the Crocker Range of Sabah to look for the Bulwer’s Pheasant at Trus Madi Conservation Area, we were surprised to find so many insects during our few days there. Most were moths that were attracted by the lights at night. But many of the strange and wonderful insects were seen during the daytime when the birds were not active.

The montane hill forests of the Trus Madi, Crocker Range.

There are many pygmy grasshoppers that mimic dead leaves, but there only two Oriental Macropterous in Asia. The Oxyphyllum found in India and Pakistan and the Paraphyllum in Borneo. David Tseu our guide knew exactly which rock face to find the P. antennatum on our way to the Trus Madi Camp. They are small and blend in well with the color of the rock surfaces. Their curved brown body looks like a dead leaf. We counted about half a dozen of them all males according to David. The females have an elongated tail.

Oriental macropterous Leaf-mimic pygmy grasshopper ( Paraphyllum antennatum)
Blending in well against the rock surface. All three are females.

We would have missed this on the track if not for David’s sharp eyes. The Pill Millipede, Glomeris sp. one of the largest millipede around, but short bodied. It exhibits the Pangolin way of defense by rolling into a ball when threatened. When left alone it will slowly open up, check the surrounding before fully extending to its full length.

The roly poly Pill Milllipede curling up in David’s Palm

Full extended size

This Tacua speciosa Cicada is one of the most colorful and also one of the loudest. Its call is unmistakable and can be heard for long distances. We missed the chance to photograph it close up and had to be contended with this back view shot.

Cicada. Tacua Speciosa

Lantern bugs of the Fulgoridae plant hopper family does not emit light but they are colorful. This is the common Pyrops sultana white body species with an orange snort, which is part of its inflated head. Wilson found this on the track near our camp.

Pyrops sultana .

I don’t know how David can spot such a small insect like this weevil resting on a thin blade of grass. This is the Larinus Weevil looking a bit like a shining beetle with a big nose.

Larinus Weevil

The menacing looking Giant Three-horned Rhinoceros Beetle, Chalcosoma moellenkampi, is one of the more common beetles that came to the screens at night. A favourite with beetle collectors, it is found only in Borneo. This is the male as the females do not have horns.

Giant Three-horned Beetle

Bee flies are colorful. This species Migya tantalus, was seen taking minerals at the Mahua Waterfalls area

Bee Fly Migya tantalus

Also on the way to the waterfalls beneath the dark forest canopy, David picked up this tiny jewel of a beetle on a leaf by the path. Borisb identified it as a Aplosonyx sp in iNaturalist. It looks like the A. monticola in another posting on iNaturalist by Gan Cheong Weei taken at the same location on 10 Jan 2019. There is not much information on this species online.

A nice find to end our trip.

Aplosonyx sp. Looks like A. monticola.

With Wilson Leung, Theresa Ng and David Tseu. 14-17 June 2022.

Many thanks to David for identifying the insects.

Reference: Wikipedia on line.

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