Dundas - the taller, less hirsute one - is a born and bred Canberran, who returned to live in the national capital in 2000 while continuing to work with Collins as they took their much-lauded, unique physical and vocal comedy around the world.

Now established as a well-known comedy act with fans around the globe, the pair met at Theatre Nepean at the University of Western Sydney in 1988, "when the Umbilical madness began".

Before then, Dundas went to primary school in Griffith and then to Telopea Park High and Narrabundah College. He then attended the Canberra College of Advanced Education, later the University of Canberra, where he got a bachelor of arts in modern languages (Japanese). He now lives on the northside.

"I may be one of the very few who have moved back to Canberra after leaving," he said.

"Away from my work I like things quiet. Canberra provides a balance between a healthy life and work that can get crazy and has involved commuting to 38 other countries.

"The air is clear, I can have a house with green around it, the majority of people are pretty smart and not dickheads, and I can jump in a car, drive for five minutes and be at the movies. What's not to like? Apart from the obvious."

Dundas and Collins teamed up with Berlin artist Johan Potma for A Monster in My House, which is about "not making assumptions about people (or monsters)".

"As with most of our work and career, there was no plan," Dundas said.

"We were on tour in Berlin a number of years ago and came across Johan's studio. We loved his fabulous, eccentric work, often featuring weird creatures. And I guess he liked ours, because he wanted to make something with us.

"It did seem like a great fit, but we went back to our regular lives and he then had to badger us to make it a reality. After repeatedly being reminded of the idea over a period of years, we finally sent him a text and started the back-and-forth."

Their shared comic sensibilities inspired the book, which is published by Puffin.

"Johan's work inspired the text, and in turn the text inspired him. So it was a chicken-and-egg situation, with some weird-arse version of a chicken, as painted by Johan, being the kick-off to the whole thing," Dundas said.

Dundas says the book is aimed for children three and older, but can be enjoyed by anyone.

"If you've got an inner child hidden somewhere, you'll like it. Pick up the book and you'll see what I mean," he said.

"Obviously there's the main story and pictures for the young kids, which has a little message about not making assumptions about people (or monsters). And the weirdness and comical detail works for the olders. It's also a perfect chance for parents to star and enhance their performance skills reading it out."

Dundas loved books growing up.

"I really went for Where the Wild Things Are, although I think I got to it later than other kids. It just takes you with it. I don't think I'd be who I am without that book," he said.

"In high school, I even wrote and illustrated my own monster book, with highly unusual monsters and detailed cross-hatching in the pictures, inspired by Maurice Sendak's work. I know David and Johan feel similar inspiration from that one."

Once named as two of Entertainment Weekly’s “100 Most Creative People In Entertainment”, the Umbilical Brothers have appeared on The Late Show with Stephen Colbert, followed James Brown at Woodstock ’99, and performed for the Queen. Their online videos are viewed by more than 200,000 people a month.

They will also soon be performing a new show, which they will debut in Canberra in February. They'll be in the Courtyard Studio at the Canberra Theatre from February 18 to March 3.

Dundas lived in Sydney for 11 years and New York for a year, where he and Collins did an off-Broadway run before returning to Canberra. And it's not quite the city he left.

"It's strange, but the hospital I was born in, the house I grew up in, and the infants' and primary schools I went to no longer exist," Dundas said.

"Even my high school and college turned into different things. One time I nostalgically drove down our old family street to check out the house, and it was literally a vacant lot. In the middle of a street in Griffith! Like a giant had just plucked it off the ground.

"Someone's been erasing my Canberra past!"