The division has begun updating a list, first created in 1954, of the largest known specimens of each native and naturalized species of tree in the state. The list was last updated in 1998, said Deedee Burnside of Waldwick, who has been helping track down trees already on the list to get new measurements.

Trees get to be considered for "Big Tree" status based on their trunk's circumference as well as height and distance the leaf canopy or crown spreads."

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