Switching model with two habitats and a predator involving group defence
  Switching model with one predator and two prey species is considered. The prey species have the ability of group defence. Therefore, the predator will be attracted towards that habitat where prey are less in number. The stability analysis is carried out for two equilibrium values. The theoretical results are compared with the numerical results for a set of values. The Hopf bifuracation analysis is done to support the stability results. 
Qamar J. A. Khan, Bal Swaroop Bhatt, R. P. Jaju