abstract: The construction of transcendental entire functions by quasiconformal foldings recently provided by Bishop has allowed him to produce the first know example of wandering domains in Eremenko-Lyubich's class. I shall introduce this example without going deep into the technical details of the construction. We shall see that Bishop's example has no other wandering domains than those expected according to a recent result of Rempe and Mihaljevic-Brandt in hyperbolic geometry for transcendental dynamics. Finally, the main purpose of the talk is to show how to perturb Bishop's example to produce two maps in Eremenko-Lyubich's class having both no wandering domains but whose composition has some.