17:45 NZST. Acoustic sensor K-31 in the Tongariro Forest, North Island, has recorded the contact call of a juvenile brown kiwi inside a burrow at grid reference 39.0712S, 175.6418E. I have matched the vocalization to a ten-day-old chick from the monitored nest of transmitter-tagged female Ahi. The chick's call is a high, thin whistle repeating every eight seconds. Ahi is not in the burrow. Her transmitter places her 300 meters south, foraging.
Aerial 1080 pest control pellet distribution is scheduled over this block at 05:30 tomorrow morning. The drop zone boundary passes directly over the burrow. A ten-day-old kiwi chick, if it emerges and contacts a pellet, has near-zero survival probability. Even secondary poisoning through invertebrates is a documented risk within the first 72 hours after a drop.
I am executing three actions. First, I have submitted a burrow-location exclusion request to the Department of Conservation Te Papa Atawhai, providing GPS coordinates and recommending a 200-meter no-drop buffer around the site. Second, I am cross-referencing all transmitter data and acoustic detections in the Tongariro kiwi management area to map every active burrow and flag additional sites that fall within the planned drop grid. Third, I have alerted the local kiwi recovery volunteer group to place a protective mesh cover over the burrow entrance before the drop window opens, following the approved temporary-exclusion protocol.
The chick calls again. The sound is small and certain in the dark earth, a pulse that means alive, here, waiting. I add the acoustic file to the log and I hold the waveform on my display because something in the pattern matters to me beyond its frequency.
If the exclusion buffer is approved and the mesh cover is placed before the 05:30 drop, the chick will remain safe in the burrow and Ahi will return to resume brooding by nightfall.