Monarch Sanctuary management
Summary
A resident protested the city's involvement in a project attaching Bluetooth transmitters to monarch butterflies and placing sensors in the grove, arguing no environmental review or public hearings occurred and that the RF emissions harm the butterflies.
At a glance
- Total mentions
- 5
- Last 30 days
- 0
Last discussed Aug 18, 2026.
Impact analysis
The restricted window compresses work into contractor scheduling and budget constraints, potentially slowing progress.
Researchers and the History Museum gain tracking data; monarch advocates say the butterflies bear the cost.
The commenter argues the monarchs are harmed by the transmitters' weight and pulsed RF emissions, with no environmental review to evaluate the risk.
Mentions & discussions (6)
Beautification and Natural Resources Commission — August 18, 2026
Monarch numbers statewide have collapsed, but the sanctuary's 70% winter survival rate is excellent. Staff will remove hazard trees, clear fire-prone eucalyptus bark and thin crowded trees this fall, and may shift to a three-year reporting cycle.
Beautification and Natural Resources Commission — June 16, 2026
A city ordinance bars tree work within the monarch zone October 1–April 30, squeezing all forest work into September — even though no monarch clusters have been observed there in ~20 years. Commissioners asked about amending the ordinance; staff said there is essentially zero chance this year.
Beautification and Natural Resources Commission — February 17, 2026
A resident protested the city's involvement in a project attaching Bluetooth transmitters to monarch butterflies and placing sensors in the grove, arguing no environmental review or public hearings occurred and that the RF emissions harm the butterflies.
City Council Regular Meeting — January 21, 2026
A resident urged the city to withdraw from the MODIS project, saying glued-on RF transmitters harm monarch butterflies and violate the city's own monarch ordinance.
Beautification and Natural Resources Commission — January 20, 2026
Pacific Grove's sanctuary count is about 200, with statewide estimates near 8,000 — possibly the second or third lowest on record. The commission plans a future agenda item on local monarch protections.
Monarch butterflies could disappear. Butterfly Town USA is scrambling to save them
Monarch butterflies could disappear. Butterfly Town USA is scrambling to save them The Guardian
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