  In this article, we use the Touchard identity in order to obtain new integral
representations for Catalan numbers. The main idea consists in combining the
identity with a known integral representation and resorting to the binomial
theorem. The same procedure is applied to a variant of the Touchard identity
proposed by Callan a few years ago. The method presented here can be
generalized to derive additional integral representations from known ones,
provided that the latter have a well-suited form and lend themselves to an
analytical summation under the integral sign.
