You might find http://www.chill.colostate.edu/w/Non-precipitation_echoes:_insects_and_smoke_particles http://www.chill.colostate.edu/w/Non-precipitation_echoes:

You might find http://www.chill.colostate.edu/w/Non-precipitation_echoes:_insects_and_smoke_particles http://www.chill.colostate.edu/w/Non-precipitation_echoes:_i... to be interesting. It shows some of the dual-pol stuff on insects.