After his studies in Decorative Arts in Genève, Pascal Habegger, who signs his work Ab'Aigre, became an illustrator of advertisements and postcards. In 1974, after a trip to the US, he decided to start his own magazine, Swing, which lasted for only one issue. After some contributions to Swiss magazines, he proposed his work to the publisher Glénat. His series 'La Route des Goélands' appeared in 1980 in Circus. In the early 1980s, he worked for the French periodicals Okapi, Métal Hurlant and Zoulou. He also started new comics and series like 'Le Chaman' (with Frank Giroud in Ice Crim's), 'Nombre' (with Thierry Smolderen for Humanoïdes Associés) and 'Blues' (for the publisher Paquet) during the 1980s and 1990s. Ab'Aigre has earned himself several prizes for his oeuvre.