Ovens also spent time planting trees for the group on wildlife sanctuary Tiritiri Matangi Island.
"She will be sadly missed by all of us at Forest & Bird North Shore," Hursthouse said.
He said there would be a large Forest & Bird contingent at Christine's funeral tomorrow. The family has asked attendees to donate to Forest & Bird North Shore, in lieu of flowers.
Oteha Valley Rd, in Northcross was closed following the incident on Thursday morning.
Resident Jun Pyo was about to turn left onto Oteha Valley Rd when he came across the scene.
Shortly after the incident he told the Herald he wasn't sure whether the white Mazda station wagon or a maxi taxi, which is obscured from his photo, was involved.
Both were left parked on the median strip.
He said the crash happened in between Harrowglen Dr and East Coast Rd.
A police spokeswoman said an investigation into the incident was ongoing.
"We are continuing to follow lines of enquiries, which can take some time to complete," she said.