Montebello's tree inventory includes 5 components:
The 2018 Woodland Tree Inventory included 564 large trees 15 inches or more in diameter at breast height (DBH--approximately 4.5 feet above the ground), plus an additional 131 trees under 15 inches in diameter, primarily in areas where erosion control construction was about to take place. For the full background, see the 71-page PDF report by Natural Resources Design.
The 2018 Developed Landscape Tree Inventory included a total of 320 trees, 43 of which were 15 inches DBH or larger. Trees as small as 2 inches DBH were counted. Except where noted below, the inventory of trees in the developed landscape is documented separately.
In early 2020, the Grounds Committee rechecked the woodland trees inventoried two years earlier and found that 32 (5.7%) of the 564 big trees (more than 15 inches DBH) had been lost in the interim, mostly due to natural causes. In addition, 32 of the 131 inventoried smaller trees were gone, mostly removed in the erosion control work of 2018-2019 and in the removal of invasive species. Read the six-page report, 2020 Update to the 2018 Montebello Woodland Tree Inventory, and view the interactive map.
In late 2020, Natural Resources Design extended the original woodland tree inventory to include all woodland trees 4 inches or more DBH that were not counted in the 2018 report. The 92-page 2020 PDF report by NRD presents figures that can be added to those in the 2018 report above.
Between 2021 and 2025, the Grounds Committee
added an inventory of the saplings that had been planted as a result of Arbor Day fundraising in 2018 and 2022, and other saplings funded by the Association through 2025.
reviewed and supplemented the earlier inventory results.
A chestnut oak near Building 1 is estimated to be the oldest tree in Montebello's woods, while a nearby tulip tree is the largest.
The woodland maps below are based on this spreadsheet, which consolidates the results of the three components of the Montebello's woodland tree inventory listed above. The spreadsheet lists trees by tag number together with their common name, botanical name, DBH, health, latitude and longitude.
Clicking on any of the images below will open a new window or tab with a zoomable version of the map. In most cases, individual tree icons can be clicked for additional information.
This image reflects all 2200 trees identified in the five inventory operations listed above, as of 2020. A total of 55 species were identified at that time, including 11 of which occur only in the developed landscape. Since there are too many colors to easily discriminate, users are encouraged to click on the map and select individual layers for further examination.
Note: The image below shows 12 species in the woodlands as of 2020, but the map on which it is based also has layers highlighting 5 invasive species and 27 less frequent noninvasive species in the woodlands, plus a fourth layer that includes trees in the developed landscape. An alternate presentation allows analysis of the distribution of nine key species in the woodlands one at a time. A genus map shows broader categories (e.g., all oaks together).
Key to tree numbering in the 2018 inventory, covering trees 1 to 799
Progress reporting on the 2023 Reinventory Project
Progress on 2023 Reinventory, phase 1, by section and subsection
Trees unmatched in 2018-2020 inventory with untagged trees found in 2023