Vordermann's flying squirrels (Petinomys vordermanni) are found scattered in central Malaysia, the coast of an island in Northwestern Indonesia, as well as a region in the center of that island. They are also found on the Belitung and Riau Islands in eastern Sumatra and southern China. They are also found near Pacific Ocean and Indian Ocean waters. It is unsure where exactly their historically native range is. Specific locations of Vordermann's flying squirrels are currently unknown. ("Vordermann's Flying Squirrel", 2017)
Vordermann's flying squirrels occupy terrestrial habitats and are found mostly in forests. They prefer tropical, moist, lowland areas and are found in neighboring swamps, in second-growth forests, and primary forests. They are found in dry forests, but the majority of their population occupies wet areas such as rain forests, swamps, and marshes.
Vordermann's flying squirrels have been seen 0.3 to 6 m above ground in nest holes and tend to forage in trees. Although the exact elevations at which Vordermann's flying squirrels live is unknown, though the locations at which they have been found range between sea level and 1,165 m above sea level. Vordermann's flying squirrels do not burrow underground, for they spend most of their lives in trees above the ground. Their tree nests are an average of 6 m off the ground, but that number can be much higher or lower depending on the location. (Fokidis and Risch, 2008; "Vordermann's Flying Squirrel", 2017)
Vordermann's flying squirrels are pigmy flying squirrels. The tails of Vordermann's flying squirrels are flattened on the bottom and bushy on top, which helps them control their pitch during flight. With orange cheeks and black fur around their eyes, they have a unique appearance. They have tufts of whiskers beneath both ears and have a posteriorly positioned coronoid process. There is light expansion of the caudal skin between the hind limbs and the tail in Vordermann's flying squirrels. They have adapted over time mainly for arboreal and gliding locomotion.
Records of bone structure of Vordermann's flying squirrels show pitted enamel and either no or few thin, short, spur-like ridges that are developed from their lophs. (Hayssen, 2008; Thorington and Hoffman, 2005; "Vordermann's Flying Squirrel", 2017)
Vordermann's flying squirrels are monogamous, meaning one female mates with one male. Vordermann's flying squirrels have an average of 2 pups per litter, and are cooperative breeders. Cooperative breeding allows children to not only be cared for by their parents, but also others in their group. It is unknown what exact role parents play in the lives of their offspring. However, in similar species, mothers provide food and milk for a few weeks until their offspring are capable of foraging on their own. (Harman, 2019)
Vordermann's flying squirrels reproduce in trees. Females have longer tails which allows for better maneuverability when carrying their young, either in utero or during lactation. The gestation period and time to weaning are still unknown for this species. Vorderman's flying squirrels are seasonal breeders, breeding once a year in the springtime. They have not been shown to breed in other seasons throughout the year.
Mating occurs usually around the months of February and March, but can also extend into April. One reproductive feature of Vordermann's flying squirrels is internal fertilization. This allows for mothers to keep their children safe inside of her until they are ready to be delivered. This behavior also ensures that there is one specific father per litter.
Vordermann's flying squirrels produce an average of 2 offspring, considering they both survive birth. The birth weights of newborn Vordermann's flying squirrels averages around 18 g. Although the time to weaning is unknown for this species, it is thought that offspring are independent after around 5 weeks of being with their parents. After this, offspring hunt for their own food. For both females and males, the average age before they are ready to reproduce is only 2.5 months. (Fokidis and Risch, 2008)
Young stay with their mothers for about 5 weeks, when they are able to leave the nest. After this is an extended period of juvenile learning. Both mothers and fathers protect their young, but mothers are the ones feeding their pups milk. Little else is known about the paternal investments of males and the length of time juveniles spend with their mothers. (Harman, 2019)
The mortality rate of Vordermann's flying squirrels is much lower in the wild due to predation. The longest known lifespan in the wild is 6 years old, but in captivity the longest known lifespan has been recorded at 15 years old. Although a lifespan of 6 years in the wild has been recorded, it is thought that the average lifespan for Vordermann's flying squirrels is 3.3 years in the wild. (Fokidis and Risch, 2008; Meijaard, 2003; "Vordermann's Flying Squirrel", 2017)
Vordermann's flying squirrels are nocturnal and crepuscular, meaning they are active at night, dusk, and dawn. This helps Vordermann's flying squirrels to stay alive during the night, when their predators are hunting. They are arboreal and scansorial which means they live in trees and are specialized to climb them. Vordermann's flying squirrels are also saltatorial, which allows them to jump and hop around quickly. Their daily torpor and sedentary behaviors suggest that they tend to stay within a small radius and spend some of each day dormant. Vordermann's Flying Squirrel are very social animals and hang out in groups or near one another.
Flights of Vordermann's flying squirrels have been recorded to be 90 m long. They glide though the air without flapping, so the taller the trees from which they glide, the longer the distances they can glide. (Fokidis and Risch, 2008; Hayssen, 2008; Hill, 1962; Nakagawa, et al., 2007; "Vordermann's Flying Squirrel", 2017)
There is no known information about a home range or territory size for Vordermann's flying squirrels.
It is known that Vordermann's flying squirrels emit different sounds, but it is unsure what exactly they mean. It is also known that Vordermann's Flying Squirrel use visual, tactile, acoustic, and chemical perceptions to perceive their environment. (Nakagawa, et al., 2007; "Vordermann's Flying Squirrel", 2017)
Vordermann's flying squirrels are omnivores, favoring plants more than other animals. Vordermann's flying squirrels store food so they do not have to forage during the season in which they are feeding their young.
The diet of Vordermann's flying squirrels includes insects, fruit, flowers/nectar/pollen, leaves/branches/bark, seeds, nuts, grass, fungi and roots/tubers. (Harman, 2019; Nakagawa, et al., 2007; "Vordermann's Flying Squirrel", 2017)
Predation of Vordermann's flying squirrels is unknown at this time, but there is some information about relative species. Arboreal squirrels take advantage of their climbing and leaping skills and less often use their running abilities on the ground to escape predators. Compared to other squirrels, flying squirrels have low body masses and long tails relative to their body length. This helps improve the aerodynamics of their flight. Some common predators of flying squirrels are hawks, owls, raccoons, snakes, and cats. It is unknown how they react to facing a predator.
Vordermann's flying squirrels benefit from eating plants and fungi by gaining energy, and plants and fungi benefit in return by having squirrels spread their spores and seeds, allowing for them to reproduce. (Harman, 2019; KIRK, et al., 2014)
Vordermann's flying squirrels provide research and educational information to researchers. Not much is known about this species, so there is a lot of room for research. One way people benefit from their existence is the control of pest and fungal populations, since Vordermann's flying squirrels consume these organisms.
There are no known negative economic impacts due to Vordermann's flying squirrels.
Vordermann's flying squirrels are listed on the IUCN Red List as vulnerable. On the US Federal List, CITES and the State of Michigan list, they have no special status.
Alison O'Dell (author), Colorado State University, Brooke Berger (editor), Colorado State University, Galen Burrell (editor).
body of water between the southern ocean (above 60 degrees south latitude), Australia, Asia, and the western hemisphere. This is the world's largest ocean, covering about 28% of the world's surface.
uses sound to communicate
Referring to an animal that lives in trees; tree-climbing.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
either directly causes, or indirectly transmits, a disease to a domestic animal
uses smells or other chemicals to communicate
the nearshore aquatic habitats near a coast, or shoreline.
helpers provide assistance in raising young that are not their own
active at dawn and dusk
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
parental care is carried out by females
forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.
referring to animal species that have been transported to and established populations in regions outside of their natural range, usually through human action.
marshes are wetland areas often dominated by grasses and reeds.
Having one mate at a time.
having the capacity to move from one place to another.
the area in which the animal is naturally found, the region in which it is endemic.
active during the night
an animal that mainly eats all kinds of things, including plants and animals
rainforests, both temperate and tropical, are dominated by trees often forming a closed canopy with little light reaching the ground. Epiphytes and climbing plants are also abundant. Precipitation is typically not limiting, but may be somewhat seasonal.
specialized for leaping or bounding locomotion; jumps or hops.
communicates by producing scents from special gland(s) and placing them on a surface whether others can smell or taste them
breeding is confined to a particular season
remains in the same area
reproduction that includes combining the genetic contribution of two individuals, a male and a female
associates with others of its species; forms social groups.
places a food item in a special place to be eaten later. Also called "hoarding"
a wetland area that may be permanently or intermittently covered in water, often dominated by woody vegetation.
uses touch to communicate
Living on the ground.
the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.
uses sight to communicate
Accessed (Date Unknown) at https://www.nwf.org/Educational-Resources/Wildlife-Guide/Mammals/Flying-Squirrels.
Accessed (Date Unknown) at https://eol.org/pages/1178634/data.
2017. "Vordermann's Flying Squirrel" (On-line). Accessed February 11, 2020 at https://www.iucnredlist.org/species/16740/115139026.
Ceballos, G., P. Ehrlich, R. Dirzo. 2017. Biological annihilation via the ongoing sixth mass extinction signaled by vertebrate population losses and declines. Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, No. 30: E6089-E6096. Accessed February 11, 2020 at https://www.jstor.org/stable/26486175?Search=yes&resultItemClick=true&searchText=Petinomys&searchText=vordermanni&searchText=habitat&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DPetinomys%2Bvordermanni%2Bhabitat&ab_segments=0%2Fbasic_SYC-4946%2Fcontrol&refreqid=search%3Aaa092268953631a0f947eabe61ddc5e9&seq=1.
Fokidis, H., T. Risch. 2008. The Burden of Motherhood: Gliding Locomotion in Mammals Influences Maternal Reproductive Investment. Journal of Mammalogy, 89, No. 3: 617-625. Accessed February 11, 2020 at https://www.jstor.org/stable/25145138?Search=yes&resultItemClick=true&searchText=Petinomys&searchText=vordermanni&searchText=reproduction&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DPetinomys%2Bvordermanni%2Breproduction%26amp%3Bacc%3Doff%26amp%3Bwc%3Don%26amp%3Bfc%3Doff%26amp%3Bgroup%3Dnone&ab_segments=0%2Fbasic_SYC-4946%2Fcontrol&refreqid=search%3A170141b7097166bd9953905c23d37cff&seq=1.
Harman, M. 2019. "Travancore flying squirrel" (On-line). Accessed April 06, 2020 at https://animaldiversity.org/accounts/Petinomys_fuscocapillus/.
Hayssen, V. 2008. Patterns of Body and Tail Length and Body Mass in Sciuridae. Journal of Mammalogy, Volume 89, Issue No. 4: 852–873. Accessed February 11, 2020 at https://doi.org/10.1644/07-MAMM-A-217.1.
Hill, J. 1962. Notes on flying squirrels of the genera Pteromyscus, Hylopetes and Petinomys. Annals & Magazine of Natural History Series 13, 4: 721-738. Accessed February 11, 2020 at http://apps.webofknowledge.com.ezproxy2.library.colostate.edu/full_record.do?product=ZOOREC&search_mode=GeneralSearch&qid=1&SID=7EvzmE8x8bBuIYzplBW&page=1&doc=5.
KIRK, E., A. KEMP, S. HOFFMANN, D. KRAUSE, P. O’CONNOR. 2014. SENSORY ANATOMY AND SENSORY ECOLOGY OF VINTANA SERTICHI (MAMMALIA, GONDWANATHERIA) FROM THE LATE CRETACEOUS OF MADAGASCAR. Memoir (Society of Vertebrate Paleontology), 14: 203-222. Accessed February 11, 2020 at https://www.jstor.org/stable/26573374?Search=yes&resultItemClick=true&searchText=Petinomys&searchText=vordermanni&searchText=habitat&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DPetinomys%2Bvordermanni%2Bhabitat&ab_segments=0%2Fbasic_SYC-4946%2Fcontrol&refreqid=search%3A88f0ba364fc4fbad4b5def171d6195fd&seq=1.
Lüzhou, L., L. Qiang, L. Xiaoyu, N. Xijun. 2017. Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor. PeerJ, v5, e3311. Accessed March 02, 2020 at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5436589/.
Meijaard, E. 2003. Mammals of South-East Asian Islands and Their Late Pleistocene Environments. Journal of Biogeography, Vol. 30, No. 8: 1245-1257. Accessed February 11, 2020 at https://www.jstor.org/stable/3554554?Search=yes&resultItemClick=true&searchText=Petinomys&searchText=vordermanni&searchText=habitat&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DPetinomys%2Bvordermanni%2Bhabitat&ab_segments=0%2Fbasic_SYC-4946%2Fcontrol&refreqid=search%3Ad2659b130271f392c94dca08441760c7&seq=1.
Nakagawa, M., H. Miguchi, K. Sato, S. Sakai, T. Nakashizuka. 2007. POPULATION DYNAMICS OF ARBOREAL AND TERRESTRIAL SMALL MAMMALS IN A TROPICAL RAINFOREST, SARAWAK, MALAYSIA. POPULATION DYNAMICS OF ARBOREAL AND TERRESTRIAL SMALL MAMMALS IN A TROPICAL RAINFOREST, SARAWAK, MALAYSIA, 55, No. 2: 389–395. Accessed February 11, 2020 at https://www.researchgate.net/profile/Tohru_Nakashizuka/publication/228505368_Population_dynamics_of_arboreal_and_terrestrial_small_mammals_in_a_tropical_rainforest_Sarawak_Malaysia/links/02e7e5265b24b388b2000000.pdf.
Thorington, Jr, R., C. Schennum, L. Pappas, D. Pitassy. 2005. The Difficulties of Identifying Flying Squirrels (Sciuridae: Pteromyini) in the Fossil Record. Journal of Vertebrate Paleontology, 25, No. 4: 950-961. Accessed February 11, 2020 at https://www.jstor.org/stable/4524521?Search=yes&resultItemClick=true&searchText=Petinomys&searchText=vordermanni&searchText=diet&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DPetinomys%2Bvordermanni%2Bdiet&ab_segments=0%2Fbasic_SYC-4946%2Fcontrol&refreqid=search%3A6ccb4dc72096ab34b4d6a79dd5d08f32&seq=1.
Thorington, R., R. Hoffman. 2005. "Vordermann's Flying Squirrel" (On-line). Accessed February 11, 2020 at https://eol.org/pages/1178634.