A DLNR 2015 SWAP factsheet (snip from factsheet) can be found here: https://dlnr.hawaii.gov/wildlife/files/2019/03/SWAP-2015-Io-Final.pdf.
Note: The Hawaiian Hawk was delisted by the federal government at the end of 2019 but it is still listed Endangered under Hawaiʻi law. Here is a description of the delisting: http://hawaiifreepress.com/ArticlesMain/tabid/56/ID/24671/Rebounding-Hawaiian-Hawk-Removed-From-Endangered-List.aspx.
Wikipedia entry: Hawaiian hawk (ʻio), Buteo solitaries.
DLNR 2015 SWAP factsheet (snip from factsheet): https://dlnr.hawaii.gov/wildlife/files/2019/03/SWAP-2015-Pueo-Final.pdf.
The Pueo is listed by the State as Endangered on Oahu. It has been reported as listed in 1982 although no readily available primary source seems to be available to confirm this date.
Details on recent studies of the Pueo on Oahu are here: https://www.pueoproject.com/.
The Wikipedia entry: Pueo (Hawaiian short-eared owl), Asio flammeus sandwichensis.