Some bird species we may hear at Hosmer Grove:

Alauda arvensis| Eurasian skylark
Asio flammeus sandwichensis| Pueo, Hawaiian short-eared owl
Branta sandvicensis | Nēnē
Cardinalis cardinalis | Northern cardinal 
Drepanis coccinea | ʻIʻiwi
Chlorodrepanis virens | Hawaiʻi amakihi
Haemorhous mexicanus | House finch
Himatione sanguinea | ʻApapane
Horornis diphone | Japanese bush warbler
Leiothrix lutea | Red-billed leiothrix
Paroreomyza montana newtoni | Maui ʻalahuahio
Phasianus colchicus | Ring-necked pheasant
Zosterops japonicus | Warbling white-eye

And two species we likely will not hear, but which deserve recognition on this page, as they are endangered and endemic to this habitat type:
Palmeria dolei | ʻAkohekohe
Pseudonestor xanthophrys | Kiwikiu

Link to NPS natural history of Hosmer Grove
https://www.nps.gov/hale/hosmer-grove.htm

Martin is the crew leader for Maui Nui Seabird Recovery Project. Some crew members and friends may be along for the stream as well.
https://mauinuiseabirds.org