Neutrinos from decaying muons, pions, neutrons and kaons in gamma ray bursts

► ν and ν¯ fluxes from decaying muons, pions, neutrons and charged, neutral kaons in GRBs. ► Relative importance of the different decay channels depends on the values of the GRB parameters. ► Neutron decay channel can be more important than the others. ► Flavour ratios are not only energy dependent, but also depend on GRB parameters.