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RT @USGSMercury: New research: Maternal transfer of mercury to songbird eggs https://t.co/Rj6VFLzQGx https://t.co/L2qZ2dWzsA
RT @USGSMercury: New research: Maternal transfer of mercury to songbird eggs https://t.co/Rj6VFLzQGx https://t.co/L2qZ2dWzsA
USGS scientists studied maternal transfer of mercury to songbird eggs https://t.co/wnc9odQQEO https://t.co/Dl1zxOP708
Songbird eggs at risk! https://t.co/u7FCOnRiHY