  The results of a 700 arcmin^2 survey for EROs are presented. The sky
distribution of EROs is very inhomogeneous and their two point correlation
function shows a very high amplitude, a factor of 10 larger than that of the
field galaxy population. Such a clustering can explain the strong variance
found in previous works, and provides evidence that ERO are mostly made of
high-z ellipticals. The surface density of EROs found in our large survey is in
good agreement with that expected for passively evolving ellipticals formed at
high redshift (z\simgt2.5).
