Birdy Foldable Bikes: The History of Pacific Cycles – Birdy Bicycle
In 2011, Riese und Muller comissioned 200 titanium Birdy bikes. Each sold for close to $5,000. Unfortunately, I did not get one… | Touring bike, Bike, Folding bike
Riese & Müller Birdy BD1 (first generation) - Bike Forums
Faltrad Birdy von Riese & Müller und VELLO BIKE+ Falträder in München Haidhausen - birdy by velo
Turning a 2001 Riese und Müller Birdy into a modern folding bicycle - Jon Worth