I need help identifying a novel about a race of "pods" and their relationship to humans. The plot, as I remember it, involved humans discovering a planet inhabited by an intelligent race, with species visually resembling pea pods, with a head on one end of it, and anus on the other.
Those pods were forming a symbiosis with a certain tree of their planet. The symbiosis was established via trees producing some type of fruit, pods were living under them, eating that fruit, and then producing manure that further fertilised the soil for the trees. Because of that, manure played a huge part in their lives (they were really soaking in it most of the time), plus their speech was so well developed, that it required (1) going into inaudible (for humans) part of the sonic spectrum, and (2) also using anus to produce the sounds.
The gist of the plot is mostly post-colonial in nature, and basically describes how humans eradicate that race simply because the idea of someone living in manure and using their anus for speech was very disturbing for some.
I read it in Russian, but it definitely was a translation, my guess is that it was most likely from English. Publication date, totally not sure, I'd guess in the 70s-80s.