Eastern Pennsylvania Phenology Project

Eastern Pennsylvania Phenology Project Phenology is the study of seasonal changes. Thanks to the Audubon TogetherGreen Fellows Program for their support of this project.

Phenology is the study of seasonal changes such as the blooming of flowers, the appearance of migratory birds, the hatching of insects, and the emergence of animals from winter hibernation. The Eastern Pennsylvania Phenology Project is encouraging the public to become citizen scientists by getting outside, observing nature, and sharing their observations. By collecting as much data as possible ove

r a series of years, we can better understand the effects of environmental changes, such as climate change, on Pennsylvania’s plants and animals. We started with signs of spring and now are interested in reports on signs of summer! Please send us your observations at [email protected].

February 3, 2024
02/04/2024

February 3, 2024

Phenology goes hi-tech:
05/21/2023

Phenology goes hi-tech:

Vegetation phenology can profoundly modulate the climate-biosphere interactions and thus plays a crucial role in regulating the terrestrial carbon cycle and the climate. However, most previous phenology studies rely on traditional vegetation indices, which are inadequate to characterize the seasonal...

04/01/2023

A lot of Phoebes made their way over the Kittatinny last night! Also saw several Mourning Cloak butterflies and a glimpse of what was likely a Comma.

02/16/2023

February 15th: 67 degrees in Bethlehem, crocuses blooming in Kunkletown. Really pleasant, but not normal.

This may be the earliest our winter aconite has emerged: January 28, 2023, Kunkletown, PA
01/28/2023

This may be the earliest our winter aconite has emerged: January 28, 2023, Kunkletown, PA

For those of you interested in phenology:
03/22/2022

For those of you interested in phenology:

One of the most iconic native North American trees is the eastern redbud (Cercis canadensis). This tree is one of the earlier flowering forest trees in the spring. Because it is beautiful when in flower, it has become a widespread ornamental tree in the USA and elsewhere around the world. We are int...

03/22/2022

Phoebes, towhees and field sparrows are back in southern Monroe Country. The first daffodils opened today as crocuses and snow drops wind down. Hellebores and pieres shrub (Andromeda) are in full bloom. But snow flurries are in the forecast for Saturday!

02/12/2022

February 12, 2022: The first aconite blooms.

I don't often post about phenology in winter, but I have been struck by what I saw blooming in December this year: forsy...
12/22/2021

I don't often post about phenology in winter, but I have been struck by what I saw blooming in December this year: forsythia, azalea, ornamental cherry trees and today (Dec 22nd) - a dandelion! Strange timing for sure!

Temperatures have hastily risen throughout the U.S., disrupting nature’s normal rhythms

Worth reading - what phenology and gardening records are telling us:
07/29/2021

Worth reading - what phenology and gardening records are telling us:

Over 45 years, his advice to Alaskans has changed with the transformation of the planet.

04/14/2021

Over the past few days, the serviceberry blossoms have opened - first on south facing slopes, and today (April 14th) they are noticeable on the north face of the Kittatinny Ridge. Such a great phenology marker!

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