Haiku is not zen, but zen is Haiku.
Haiku is the shortest form of poetry in world literature.
It`s little lines of 5-7-5 syllables are capable of expressing deep feeling and intuition.
There is no symbolism or egotism in Haiku.The Method of Zen
Haiku shows us how see into the life of things and gain a glimpse of enlightenment.
Haiku knows when enough has been said.
Haiku is a kind of Japanese poetry. Previously called hokku, it was given its current name by the Japanese writer Masaoka Shiki at the end of 19th century. Shiki suggested haiku as an abbreviation of the phrase "haikai no ku" meaning a verse of haikai. A hokku was the opening verse of a linked verse form, haikai no renga. In Japanese, hokku and haiku are traditionally printed in one vertical line (though in handwritten form they may be in any reasonable number of lines). In English, haiku are usually written in three lines to equate to the three parts of a haiku in Japanese that traditionally consist of five, seven, and then five on (the Japanese count sounds, not syllables; for example, the word "haiku" itself counts as three sounds in Japanese (ha-i-ku), but two syllables in English (hai-ku), and writing seventeen syllables in English produces a poem that is actually quite a bit longer, with more content, than a haiku in Japanese). http://www.paralumun.com/zenhaiku.htm
A world of dew,
and within every dewdrop
a world of struggle
frog jumps in
in one gust
the last leaf decides:
-Robert Henry Poulin
The beggar's shouting fingers
find no listener's eye.
loud window thud
in my cupped hand
the little bird dies
-Yao Feng (Tasmania)http://www.viewonbuddhism.org/resources/zen_poems.html