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Dusky leaf monkey, Trachypithecus obscurus - Kaeng Krachan National Park, Thailand. Photo by Thai National Parks.

Dusky leaf monkey, Trachypithecus obscurus – Kaeng Krachan National Park, Thailand. Photo by Thai National Parks.

I have been wanting to expand Ferrebeekeeper’s “mammals” categories by writing more about primates…but primates are really close cousins.  They are so near to us on the tree of life that it is tricky to write about them.  Monkeys and apes venture into the uncanny valley…that uneasy psychological chasm that contains things that are very much like humans, but clearly are not humans.

The Dusky leaf monkey (Trachypithecus obscurus)

The Dusky leaf monkey (Trachypithecus obscurus)

Therefore, in order to ease us into the subject of primatology, I am going to start with the spectacled langur aka dusky leaf monkey (or, more properly Trachypithecus obscurus).  This is a beautiful langur which lives in the dense rainforests of Malaysia, Burma, and Thailand, but realtively little seems to be known about the creatures. Adult male dusky leaf monkeys weighs approximately 8.3 kilograms (18 pounds). Females are somewhat smaller.  The monkeys live in troops of about ten or a dozen and they subsist on a variety of tropical fruits and nuts (supplemented perhaps occasionally with other vegetables or small animals).  Infants are born orange, but quickly turn dark gray with the distinctive “spectacles” for which the species in known. I don’t really have a great deal of information about these monkeys, but I am blogging about them anyway because they are adorable!  Just look at these young langurs.  This is exactly the sort of cute introduction which we need to get us started on the topic of primates.  We will work on the serious grim monkeys later!

Dusky Leaf Monkey (Trachypithecus obscurus) photo by Petfles

Dusky Leaf Monkey (Trachypithecus obscurus) photo by Petfles


The Gandik Diraja, the crown of the Queen of Malaysia

Known as the “Gandik Diraja”, the crown of the Queen of Malysia is a diadem made of diamonds and platinum.  The crown centers around a large diamond star and crescent which are surrounded by abstract “awan larat” designs.  The crown is also a transformer and can be taken apart to form a locket and a set of brooches (if wearing a crown seems to ostentatious, and the queen yearns for the modest elegance of, you know, huge platinum diamond brooches).   In 1984, the Gandik Diraja was created from a previous version by Garrard jewelers, an ultra-luxury jeweler in London.

Malaysia has an unusual version of monarchy in which the king (or more properly the Yang di-Pertuan Agong) is elected every 5 years from among the rulers of the nine Malay states.  The Gandik Diraja therefore gets passed around a lot! It was designed to be bland (well, bland for a huge jeweled hat) so that it would go with many different outfits and suit the varying tastes of lots of different royal consorts.  The tiara is accompanied by the Kalung Diraja, a large diamond and platinum necklace which unaccountably looks like echinoderms or spiders. Just like the diadem, the necklace can be taken apart and worn as earrings and brooches.  Who knew that Malysian royalty had such a penchant for brooches?

The Kalung Diraja

The Glass Catfish, Kryptopterus bicirrhis (An exceptional photo by Holger Knudsen)

The most transparent known vertebrates are the Asian glass catfish of the genus Kryptopterus.  The two most popular species are Kryptopterus minor, the ghost catfish, and Kryptopterus bicirrhis, commonly known as the glass catfish, which is a mainstay in the tropical aquarium.

Asian glass catfishes live in slow turbid streams throughout Thailand, Malaysia and Indonesia.  They are schooling predators who feed on tiny arthropods, worms, and minnow fry. Camaraderie is important for the little fish—outside of a school, individuals rarely survive (even in an aquarium where all of their other needs are met and they lack predators).  Their remarkable transparency serves as camouflage, hiding them from predator and prey alike.  Growing to a maximum of four inches the catfish live for up to eight years.

A School of Glass Catfish

Asian glass catfish are scaleless and lack pigment, however the cellular dynamics of their transparent tissues are still not fully understood.  In living specimens, the animal’s skeleton is quite visible and its internal organs can be seen with a silver sack.  A viewer with a powerful magnifying glass can watch the fish’s heartbeat and determine the contents of its stomach.  When the catfish dies so does its transparency–after death they turn an opaque white.

The catfish is commercially important for the aquarium trade.  It seems possible that exporters in South East Asia have devised a way to breed the fish en masse, but, if so, it is wholly unknown in the west. The Phantom Glass Catfish is also a major ingredient of some of the salty fish sauces used in Malaysian and Indonesian cooking.

Ye Olde Ferrebeekeeper Archives

June 2023