DOC runs 19 sanctuaries for Takahē, but most are nearing capacity as the number of successfully breeding pairs grows.
The Burwood Takahē Centre, in Southland, has 300 birds, 23 of which were scheduled to move to Kahurangi National Forest early last month to make room and boost populations in the wild.
However, because of a a mild winter the Takahē mated early and cannot be moved until next year.
DOC Takahē Operations Manager Deidre Vercoe said the Takahē team put in a big effort to prepare for the transfer, but unfortunately the birds had other things on their minds.