Aerial view of a sprawling farm with woodlands behind and city in the far background

Aerial view of Erdenheim Farm

New Life For One Of America’s Oldest Farms.

November 30, 2019

Just 14 miles northwest of the William Penn statue atop Philadelphia’s City Hall, where Chestnut Hill meets suburban Montgomery County, flocks of Cheviot sheep, herds […]

green praying mantis perched on plant with blue flowers

Praying Mantis Or Preying Mantis?

November 18, 2019

Our native praying mantis species Stagmomantis carolina is in decline because of their non-native cousins, the Chinese and European mantids.

Groundhog

What Do Groundhogs Do In Winter?

February 2, 2015

by Tim Burris, Mariton preserve manager. As part of my series about how animals handle winter I thought I would start off the mammals with […]

snow in the woods at Crow's Nest Preserve

Winter Scenes

January 23, 2015

By Daniel Barringer, Preserve Manager While reviewing photos documenting last year’s conservation easement monitoring I have been struck by how last winter, everything was snow […]

Sunrise shining bright orange on trees in the distance

Sunrise at Crow's Nest Preserve

Looking West At Sunrise

December 18, 2014

By Daniel Barringer, Preserve Manager. And looking East at sunset… We’ve had the kind of weather conditions lately where the sky clears at the horizon […]

hail on green grass, a wooden bench, and a short stone wall

Hail storm at Crow's Nest Preserve

After Two Hailstorms

May 23, 2014

By Daniel Barringer, Preserve Manager. Wow. This was unlike anything I have ever experienced. Two heavy hailstorms separated by a few minutes of sun. Just […]

Screech Owl in nest box at Hildacy Preserve

Attracting Owls, Kestrels, Wood Ducks And Blue Birds

March 27, 2014

Installing nest boxes can help attract migratory nesting birds like screech owls, wood ducks, blue birds, and kestrels.

a bird with a red breast and speckled black and white wings wades through water with its beak downturned almost touching the surface of the water

A Red Knot (Calidris canutus) wades into the waters at Glades Wildlife Refuge in spring.

Remarkable Red Knots

May 24, 2013

About halfway along their spring trek, Red Knots make a critical stopover to Delaware Bay to refuel before continuing on. In fact, an estimated 90 percent of the entire species population can be found on the Bay in a single day.

who took this photo? we need a photographer name to post.

Natural Lands Protecting Against Climate Change

December 28, 2011

Guest blog by Andy Pitz and Roger Latham, Ph.D. Have you ever heard of the puss caterpillar? Chances are that unless you’re from the South […]

Solar panels on the roof of Gwynedd Preserve management center

Solar Array

June 21, 2011

by Tim Parkany, Regional Director of Building Stewardship. Our Building Stewardship staff members have put the finishing touches on our first solar array, which was installed […]