at day's end,
the sun dips behind a tree,
but fails to hide.
Day’s End Fail [Senryū]
Tiger Riding for Beginners
Traveling Poet Philosopher & Occasional Wiseacre
at day's end,
the sun dips behind a tree,
but fails to hide.
Tiger Riding for Beginners 
Because of the nature element, I’d call this a haiku rather than a senryu. In any case, it’s lovely!
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Thanks. Incidentally, I call it a senryu because it is not strictly imagist (or — more properly — not purely descriptive of sensory experience) — i.e. it has a touch of attributing motive / anthropomorphizing. That said, understood, there are a lot of divergent definitions for these forms out there, and even differences between American and Classical Japanese haiku (and Classical and Modern Japanese Haiku.) But, in truth, I’m not even consistent with my own definitions, let alone that of some broader consensus.
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