Audubon Society
National Wildlife Service
Parker
Sierra Club
air warden
armature
attendant
bearward
bull
caretaker
castellan
cerberus
commandant
conservationist
conservator
constable
curator
custodian
custos
deliverer
enjoyer
forest ranger
game warden
gamekeeper
gaoler
governor
guard
guardian
guardian angel
have
haver
holder
jailer
janitor
lifeguard
lifesaver
next friend
nurse
possessor
preservationist
preserver
principal keeper
prison guard
clerk
farmer
gardener
groom
housekeeper
inmate
inspector
manager
master
mistress
overseer
owner
patron
physician
porter
protector
servant
steward
superintendent
beeper
cheaper
deeper
reaper
sleeper
steeper
sweeper