I found this simple discription of the contrast of the two forms on the web at: http://www.tnellen.com/cybereng/haiku/senryu.html Here is a short quote that I found especially illuminating..... At the simplest level, haiku are verse about nature and humanity, written in a 5-7-5 syllable pattern, while senryu are haiku-like verse, not necessarily about nature, not necessarily in that pattern. Sign in to see full entry.
Observing changes through the lense of haiku. Fall's Prairie Full with shades of brown, hints of green, summer's embers - grasses in autumn. Sign in to see full entry.