Quiet working time of employees of the National Museum of American Indian was interrupted by a mother-duck, “traveling” in the streets with her 13 ducklings. The employees didn’t remain indifferent. When the mother came to the National Air and Space Museum, a guard gathered her kids in a bucket and carried them to the nearby pond, and the mother walked near him quacking angrily.

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Another similar story about a duck and her babies, this time in New Yourk.
"A mother mallard, who built her nest on a traffic island in the middle of the busy thoroughfare, panicked and abandoned her 11 ducklings when well-meaning New Yorkers tried to help her web-footed little legion reach safety." [nypost]

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"They put some of the babies in a basket in the hopes they would call their mother." [nypost]

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Here's her ducklings saved by rangers.

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"The mother is reunited with her babies in Central Park." [nypost]

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"The rangers slowly guided the family through the park, and they all jumped into The Lake near The Boathouse." [nypost]

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Source