I know that you are looking for the Blue Bird, that is to say, the great secret of things and of happiness, so that Man may make our servitude still harder. … I do not hear the Animals... Where are they?... All this concerns them as much as us... We, the Trees, must not assume the responsibility alone for the grave measures that have become necessary... On the day when Man hears that we have done what we are about to do, there will be terrible reprisals... It is right, therefore, that our agreement should be unanimous, so that our silence may be the same...
The Oak - The Blue Bird (1908)