Richmond-San-Rafael-BridgeA tiny unborn hummingbird is getting in the way of a big bridge project near San Francisco.


The discovery of a nest and egg in a tree is stalling a $US70 million ($A92 million) upgrade to the Richmond-San Rafael Bridge about 50 km north of San Francisco, officials said on Tuesday.


The species, Anna's Hummingbird, is protected under the Migratory Bird Treaty Act that forbids the removal of the egg.


The nest - about half the size of a fist - was discovered in a tree set to be removed about a week ago.


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by Ahn Jae Wook | SOURCEABLE