  We have studied over 1600 Am stars at a photometric precision of 1 mmag with
SuperWASP photometric data. Contrary to previous belief, we find that around
200 Am stars are pulsating delta Sct and gamma Dor stars, with low amplitudes
that have been missed in previous, less extensive studies. While the amplitudes
are generally low, the presence of pulsation in Am stars places a strong
constraint on atmospheric convection, and may require the pulsation to be
laminar. While some pulsating Am stars have been previously found to be delta
Sct stars, the vast majority of Am stars known to pulsate are presented in this
paper. They will form the basis of future statistical studies of pulsation in
the presence of atomic diffusion.
