FRANK FILM Rare gulls nesting in the ruins of a demolished central Christchurch office block may have a new home in the city's red zone. Christchurch’s population of endangered tarāpuka/black-billed gulls may have a new home. The city council is hoping to fashion a new site for the gulls in what was once part of Bexley, now in the city’s red zone. Council ecologist Andrew Crossland told Frank Film the existing bank will be reshaped to allow shallow flooding of tidal waters during spring tides, leaving small “islands” to mimic the stony banks and islands of Canterbury’s braided river systems where the gulls naturally live.