  Inspired by the so appealing example of red giants, where going from a
handful of stars to thousands revealed the structure of the eigenspectrum, we
inspected a large homogeneous set of around 1860 {\delta} Scuti stars observed
with CoRoT. This unique data set reveals a common regular pattern which appears
to be in agreement with island modes featured by theoretical non-perturbative
treatments of fast rotation. The comparison of these data with models and
linear stability calculations suggests that spectra can be fruitfully
characterized to first order by a few parameters which might play the role of
seismic indices for {\delta} Scuti stars, as {\Delta \nu} and {\nu_{max}} do
for red giants. The existence of this pattern offers an observational support
for guiding further theoretical works on fast rotation. It also provides a
framework for further investigation of the observational material collected by
CoRoT and Kepler. Finally, it sketches out the perspective of using {\delta}
Scuti stars pulsations for ensemble asteroseismology.
