Results from long-term monitoring efforts show that Black Tern (Chlidonias niger) population declines in the Klamath Basin are higher than declines previously documented for continental and regional populations. Results from a 10 year study conducted by Klamath Bird Observatory show a steady, sharp decline in numbers of Black Terns in the wetlands and open waters of Agency Lake and Upper Klamath Lake. According to a Black Tern conservation plan created in 2006, the desired population objective within the Great Basin — which includes the Klamath Basin — is 10,000 individuals. The current estimate of Black Terns for this area is already some 20% below the objective, making these local declines a red flag.
Source: Klamath Bird Observatory, 25 July 2017
http://callnote.klamathbird.org/2017/07/25/black-tern-population-declin…
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