  In this paper, we proposed a population model depicting the dynamics of a
prey showing group defence against a generalist predator. The group defence
characteristic is represented by Hassell-Varley functional response. We studied
the local and global stability and behaviour of the model around the
co-existent equilibrium solution. Analysis on Hopf bifurcation and power
spectra has also been done. Numerical simulations have been done to confirm the
obtained analytical results as well as to validate the proposed model.
