  We proposed a three-species food chain model with hunting co-operation among
the middle predator. In this model, third species prey on the middle species
and the middle prey on the first species. The hunting cooperation among the
middle predator affects interestingly on the numbers of both the predators and
the prey. We examined the linear stability of the model theoretically and
numerically. We conducted the two-parameter numerical analysis to check the
long-term behavior and the change in the number of species with respect to
hunting co-operation. Our findings supported the postulates from the two
species food chain model with hunting co-operation.
