  This report is the write-up of a rapporteur talk on neutrino astronomy given
at the 34th International Cosmic Ray Conference in The Hague, Netherlands, in
2015. Here, selected contributions on the neutrino astronomy from the total of
40 talks and 90 posters presented in NU sessions at the 34th ICRC are
summarized in the attempt of providing a status report on this rapidly glowing
new field. The field of neutrino astronomy has recently experienced a "phase
transition" since the first observation of high energy cosmic neutrinos.
Extensive efforts have been made to identify the origin of the neutrino flux
observed in the 100 TeV to PeV region, from both theoretical and experimental
perspectives. In addition, the search for neutrino fluxes beyond the observed
level has become increasingly important for further understanding the origin of
the observed cosmic-ray up to $10^{20}$ eV. Although the IceCube Neutrino
Observatory is the only experiment currently measuring this neutrino flux, its
initial measurements have been confirmed via analysis using several independent
detection channels. Further, there have been a number of developments in the
search for neutrino point sources, while no successful observations have yet
been reported. Following the IceCube observations, a large number of studies of
next-generation neutrino detectors, including up-scaled underground Cherenkov
neutrino detectors and Cherenkov radio neutrino detectors, have been reported.
