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Environment

Wildlife biologist Christina Aiello found an endangered Peninsular bighorn sheep dead on Wednesday, June 3, 2026, after becoming entangled in concertina wire in the Jacumba Wilderness. U.S. Customs and Border Protection is closing gaps in the California-Mexico border with concertina wire.
Christina Aiello
/
Wildlands Network
The fatal entanglement is raising alarms among wildlife experts who say the concertina wire poses a threat to regional biodiversity.
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