Who are the oldest monks on Oahu?

When I have a Monk question I ask a Monk Master, well not just A monk master, but The Monk Master. In fact he's so much of a Master Monker, the Monks even think he's one of them. So I ask the Master . . . DB: Who R the oldest Monks (male or female) on Oahu?

Hana:
In answer to you query about who is the oldest critter, 4DJ (aka T21M) is amongst them. 4DJ (T21M), 4DI (T757), TT40,& T15M (aka Sharkbite) where all first identified in 1987, on Laysan. All of those animals were already adults (at least 5 yrs old) at that time which makes them minimum of 27 today, but they could be older too. None had been seen at birth, so that is as close as we can come. All are males. There are 2 other animals, R2AW (T34M), and R5AW (TF20), who were seen in 1988, also on Laysan, and again were already adult males. Those are the oldest dudes in my world. All spend time on Oahu but all have been seen on other islands as well.

Aloha, DB