k1 = r_a
k2 = K_a
k3 = beta_a
k4 = mu_a
k5 = delta_a
k6 = pi_h
k7 = beta_h
k8 = mu_h
k9 = gamma
k10 = delta_h
k11 = M_a
k12 = m_a
k13 = compartment
k14 = Avian_population