Translation

The Japanese word for "Woodpecker" is kitsutsuki キツツキ.

Romaji ki tsu tsu ki
Hiragana
Katakana
Kanji 啄木
Meaning Peck Tree Bird
School Level , 小1, 小2

Loan-word

The word "Woodpecker" katakanized would be uddopekkā ウッドペッカー.
Romaji u ddo pe kkaa
Katakana
Hiragana

Further Reading

Wikipedia: Woodpecker (啄木鳥)