  In this paper, a novel West Nile Virus model looking upon the infected birds
as monitoring threshold, for the mosquitoes and birds with impulsive state
feedback control is considered. We obtain sufficient conditions of the global
asymptotical stability of the system without impulsive state feedback control
via comprehensively qualitative analysis. By using the Poincar\'e map, we
obtain that the system with impulsive state feedback control has a positive
periodic solution of order-1 or order-2 which is asymptotical stability due to
the analogue of Poincar\'e criterion, theory of differential inequalities,
differential equation geometry and so on. What's more, sufficient conditions
for existence and stability of the order one periodic solution are given by the
existence and uniqueness of the limit. Our results show that the control
measure is effective and feasible by means of numerical simulations.
