We show that if an ovoid of Q (4,q), q even, admits a flock of conics then
that flock must be linear. It follows that an ovoid of PG (3,q), q even, wh
ich admits a flock of conics must be an elliptic quadric. This latter resul
t is used to give a characterisation of the classical example Q(-)(5,q) amo
ng the generalized quadrangles T-3(O), where O is an ovoid of PG (3,q) and
q is even, in terms of the geometric configuration of the centres of certai
n triads.