Tanuki - Where are you?

Summary: Where are tanuki found? Join Kiersten as she looks at the range of the Japanese raccoon dog.

 

For my hearing impaired listeners, a complete transcript of this podcast follows the show notes on Podbean

 

Show Notes: 

Biology and Conservation of Wild Canids, edited by David W. Macdonald and Claudio Sillero-Zubiri. Raccoon dogs: Finnish and Japanese raccoon dogs - on the road to speciation?” By Kaarina Kauhala and Midair Saeki, pgs 217-226. https://static1.squarespace.com

 

Music written and performed by Katherine Camp

 

Transcript 

(Piano music plays)

Kiersten - This is Ten Things I Like About…a ten minute, ten episode podcast about unknown or misunderstood wildlife.

(Piano music stops)

Welcome to Ten Things I Like About… I’m Kiersten, your host, and this is a podcast about misunderstood or unknown creatures in nature. Some we’ll find right out side our doors and some are continents away but all are fascinating. 

This podcast will focus ten, ten minute episodes on different animals and their amazing characteristics. Please join me on this extraordinary journey, you won’t regret it.

  Last episode I introduced you the Japanese raccoon dog, the tanuki. In this episode we’re going to talk about where they can be found. Which I s the second thing I like about them. You may be thinking, it’s a Japanese raccoon dog, so what more is there to discuss. They’re from Japan. You are right, listener, but that’s not the end of the story. Let’s take a deeper dive into where the tanuki can be found.

The native range of the raccoon dog covers much of China, northeast Indochina, Korea, Amur, and Ussuri regions of Eastern Siberia, Mongolia, and Japan. 

The earliest known ancestors of the raccoon dog are 3.7 million years old. Fossils of a subspecies was found in Europe 4 million years ago. Nyctereutes megamastoides, a large ancestor of raccoon dogs, lived in Europe while another subspecies, Nyctereutes sinensis lived in China during the Pliocene era and the early Pleistocene era. The distribution of this animal decreased during the Pleistocene. Nyctereutes megamastoides went extinct and Nyctereutes sinensis decreased in size. The later Chinese species evolved into the modern species we know today.

The ancestors of todays residents of Japan probably colonized this area between 0.4 Ma and 12,000 years ago using the Sakhalin or Korean peninsulas. When the Japan Sea opened approximately 12,000 years ago the modern tanuki became isolated from other subspecies. These individuals began to adapt to a mild marine climate.

Another subspecies evolved in Russia adapting to much colder climates. Their fur caught the eye of humans who introduced them to European parts of the Soviet Union in the first half of the twentieth century. As many introduced species do, the raccoon dog spread quickly and was detected in Finland in the 1930s. The Finnish population peaked in the 1980s and has remained stable. Raccoon dogs are currently among the most numerous carnivores in Finland.

The two different populations of raccoon dogs have evolved to be distinct from each other in size and behavior. We’ll talk more about these differences in future episodes. 

  Where within these two distinctive populations, Japan and Finland, can we find the raccoon dogs? In Japan, they can be found all over the country, but they can be classified into mountain types and village types, at least in the satoyama habitat where their home range use was studied. The mountain type where found to favor secondary forest and herbaceous areas. The village type was found in agricultural landscapes. Within both of these types, the least favorite habitats were the cedar plantations and the most favored were rice fields. Much like this mammals, namesake, the North American raccoon, tanuki can be found in urban areas as well. Within urban cities, they are found most often in areas with forest cover.

In Finland, the tanuki uses different habitat seasonally. In southern Finland they used a barren heath habitat in all seasons, while they used moist heath habitat in late summer. Lake shore were all popular in both summer and autumn where food resources were plentiful regardless of the season. Water is also useful when these mammals encounter domestic dogs. They often run into the water to get away from the dogs.

Rock piles on barren heaths provide great denning options during breeding season. When young are able to leave the den in mid-summer, parents will take them into meadows and abandoned fields. In late summer moist heath fields attract these omnivorous creature with abundant berries and insects. Autumn leads the raccoon dog to pine forests in search of abundant berries and into human cultivated gardens.

I found it interesting that these two populations used available habitat and resources in different ways. It shows how adaptable these creatures are. It speaks well of their continued survival in an ever changing world. It also, once again, shows a similarity with their namesake, Procyon lotor.   

That’s it for this episode of the Tanuki. I know we got a little scientific in this episode but my second favorite thing about this critter is where they are found and that could only be described with a little fossil talk. Thanks for hanging in there.

 

If you're enjoying this podcast please recommend me to friends and family and take a moment to give me a rating on whatever platform your listening. It will help me reach more listeners and give the animals I talk about an even better chance at change. 

 

Join me next week for another fascinating episode about Tanuki.    

 

(Piano Music plays) 

This has been an episode of Ten Things I like About with Kiersten and Company. Original music written and performed by Katherine Camp, piano extraordinaire.