Currently participating in Tree Spotters or just getting started? Attached are resources to help you get acquainted with our measurement guides and protocols!


Quick Start GuideA quick guide on where to go and what to bring while you spot


Flower GuideA guide to the flowers for each species and a glossary of terms


Training PresentationAn in-depth look at everything you'll need to know to participate


Refresher Training Presentation and VideoA quick review for current Tree Spotters


Phenology Timeline – An overview of when to expect our species' phenological events during spring and summer


River Birch Phenophase GuideA thorough guide with pictures for each phenophase 

A Brief Introduction to Tree Spotting

Here is a short little video produced by Danny Schissler and written by Suz Mrozak to spread the word about our Tree Spotters program.


Phenophase Guides

Species specific guides using written descriptions and pictures as aides for recording observations for each phenophase

River Birch Guide 

Female Cottonwood

Sugar Maple


Holiday Party Presentation

Here is the presentation given on the Holiday Potluck party reviewing the program's numbers and future plans and goals. And here is a video from Lizzie!


BBQ 2016

Here is a link to a presentation showing a breakdown of the observations gathered by our diligent volunteers. The data was collected July 12, 2016 and was first presented at our July Spotting Together event. Since starting the project, we have tallied nearly 50,000 observations on the National Phenology Network, which is quite a feat. We are so pleased with our volunteers! 



Species Fact Sheets – Visual references and descriptions for the species you'll be analyzing:


All species

Tilia americana

Quercus rubra

Quercus alba

Populus deltoides

Fagus grandifolio

Carya ovata

Carya glabra

Betula nigra

Betula alleghaniensis

Aesculus flava

Acer saccharum


Follow us on social media:


Tree Spotters Get Social Guide

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Temporal Ecology Lab blog
one lab two worlds:

In Boston
Arnold Arboretum
1300 Centre Street
Boston, MA 02131

In Cambridge 
Harvard University Herbaria
22 Divinity Ave
Cambridge, MA 02138
ph: 617.384.5495