The last time the city catalogued its street trees was back in 2005-2006, when they found about 592,130 trees on public streets, including their species, trunk thickness, and condition (you can explore a map of all this info). In the summer of 2015, the Parks Department put out a call for volunteers to help with the next round of data collection, and they received help from 2,241 individuals who completed a third of the work. They’ve now released the results of the 2015-2016 census, which shows an increase of 12.5 percent to 666,134 trees covering 209 species, and compiled their findings into an interactive map.

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