WASHINGTON (AP) -- The Smithsonian's National Zoo says it's on 24-hours-a-day panda watch as a female giant panda shows behavioral changes consistent with a pregnancy or pseudopregnancy.
Officials said Thursday that volunteer behavior watchers have been monitoring Mei Xiang via panda cams all day and night since Aug. 7. Keepers say Mei Xiang is very lethargic, eating less and shredding bamboo for her nest.
Zoo officials say the panda sometimes cradles and grooms her toys.
Keepers say the behaviors have been seen every year during this time.
Veterinarians have tried, but failed, to perform ultrasounds.
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