How do i find my biological father who lived in New Zealand?

Question:

How do i find my biological father who lived in New Zealand?

I know his name is Bruce Davies and approximate date of birth.
He lived in Greerton, Tauranga,New Zealand. He was good friends with my grandfather (his surname Gates - Te Keeti) who lived in Welcome Bay, Tauranga New Zealand. My mother said he was an only child. He may be about 65 - 67 yrs now.???I have a black and white photo of him with 3 other men and he looks to be in his mid to late 20's??? He doesn't know about me. Mum said he married and moved to Australia but i am not sure when. I was born in 1970 so it may have been before I came along.I would really appreciate any feedback.

Best Answer - Chosen by Asker: If you live in either New Zealand or Australia, look up the electoral rolls, that is if he hasn't changed his name. You could try the telephone directories on line for both countries, even if you don't live there. Again if you live in NZ you could go to Greerton and see if you can find anyone who knew him. They may be able to tell you where he went to or who else to contact and then you may have to repeat the process. Good luck.