The Delaware Valley Ornithological Club (DVOC) is one of the oldest ornithology organizations in the United States. Founded in 1890, the club has held regular meetings at the Academy of Natural Sciences of Philadelphia for over 125 years, and has published the periodical Cassinia since 1901. Membership is open to any dues paying person with an interest in birds. The club organizes birding field trips throughout the Delaware River valley region, including a dedicated year-round trip schedule within the city limits of Philadelphia (BirdPhilly).
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The Raven LunaChicks run 2026 WSB in Gloucester County
Remembering Doris McGovern
Meetings
September 17, 2026 @ 7:15 pm - 9:30 pm
1900 Benjamin Franklin Parkway, Philadelphia
The in-person portion of the meeting will be held at the Academy of Natural Sciences, BEES classroom (3rd floor).
Meeting agenda:
7:15 PM: Zoom opens
7:30-8 PM: Club business
8 PM: Presentation followed by questions (might start earlier if club business finishes earlier).
Please register for the meeting whether you will be attending in person or via Zoom. Then watch for the meeting link in your email. Disregard the meeting link if you will be attending in person.
Fantastic Feathers: Form and Function
Speaker: Lorna Gibson, MIT (remote speaker)
“Have you ever wondered how birds work? Lorna Gibson’s new book, Birds Up Close: An Engineer Explores Their Hidden Wonders, draws on her experience as a professor of engineering at MIT and as a lifelong birder, to describe how birds work from an engineering perspective. Feathers, bones, bills, eggs, flight: all come in for scrutiny, sometimes at the microscopic scale, sometimes at a more macroscopic scale. Join Lorna as she shares highlights from the book on how the microscopic structure of feathers gives rise to their remarkable properties.
—
ABOUT THE SPEAKER
Lorna Gibson is the Matoula S Salapatas Professor of Materials Science and Engineering at MIT and a MacVicar Faculty Fellow, MIT’s top award for undergraduate teaching. She is a member of the Board of Directors of the Massachusetts Audubon Society. She has always loved nature and getting outside to walk, bicycle and bird.
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Field Trips
Free to all members and non-members
Please join us for a bird walk at Houston Meadow!
We will meet at the trailhead on Cathedral Rd (GPS: 40.0676499, -75.2297505) and walk about 2.5 miles. There should be plenty of street parking. The terrain will be a loop hiking trail through woods and meadows with some moderate incline. Dress for weather and bring plenty of water and bug spray.
No binoculars? No worries! Birding backpacks with binoculars and field guides are on loan at all Philly Free Library branches.
For questions, please reach out to birdphillywalks@gmail.com.
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Free to all members and non-members
Please join us for a bird walk with our friends at The Discovery Center. We should get great looks at our local birds and maybe encounter an early migrant warbler or two.
We will meet at the parking lot. If needed, you can park on the other side of the road at the disc golf course. We will walk around 1.5 miles on an unpaved path on mostly flat terrain. Dress for weather.
No binoculars? No worries! Birding backpacks with binoculars and field guides are on loan at all Philly Free Library branches.
For questions, please reach out to birdphillywalks@gmail.com.
The event is free and open to everyone.
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BirdPhilly is an initiative of the Delaware Valley Ornithological Club. Founded in 1890, the DVOC has been based at the Academy of Natural Sciences of Philadelphia since 1891. The DVOC runs fields trips throughout the tri-state region, however BirdPhilly focuses on trips within in Philadelphia city limits in collaboration with Philadelphia Parks & Recreation and the Fairmount Park Conservancy.
Through BirdPhilly our goal is to increase interest and awareness of Philadelphia’s birds by providing quality birding experiences on expertly guided field trips. All field trips are free unless the site charges an admission fee. These trips are open to children, adults, and well behaved pets. BirdPhilly also participates in DVOC’s Philadelphia Bird Race to raise funds for conservation and research projects.
The club enthusiastically welcomes new members – young people, beginners and anyone else who is genuinely interested in birding. Members benefit from the wealth of information and expertise that this club offers. The bi-annual club journal, Cassinia, is provided to members.
People interested in receiving the club's weekly email newsletter can sign up by using the button below. Note that new club members start to receive the newsletter automatically after joining the club.
© Bert Filemyr
The Delaware Valley is the name given to the region that lays on either side of the Delaware River, centered on Philadelphia. This consists of southeastern Pennsylvania, central and southern New Jersey and the state of Delaware. Tell me more...
The following counties fall within our boundaries.
In Pennsylvania;
Berks County, Bucks County, Chester County, Delaware County, Lancaster County, Lebanon County, Lehigh County, Montgomery County, Northampton County and Philadelphia County.
In New Jersey;
Atlantic County, Burlington County, Camden County, Cape May County, Cumberland County, Gloucester County, Hunterdon County, Mercer County, Middlesex County, Monmouth County, Ocean County, Salem County, Somerset County and Warren County.
In Delaware;
New Castle County, Kent County and Sussex County
DVOC Flickr Page
Want to see and share photos of Delaware Valley birds? Check out our Flickr page.
BirdPhilly is an initiative of the Delaware Valley Ornithological Club. Founded in 1890, the DVOC has been based at the Academy of Natural Sciences of Philadelphia since 1891. The DVOC runs fields trips throughout the tri-state region, however BirdPhilly focuses on trips within in Philadelphia city limits in collaboration with Philadelphia Parks & Recreation and the Fairmount Park Conservancy.
Through BirdPhilly our goal is to increase interest and awareness of Philadelphia’s birds by providing quality birding experiences on expertly guided field trips. All field trips are free unless the site charges an admission fee. These trips are open to children, adults, and well behaved pets. BirdPhilly also participates in DVOC’s Philadelphia Bird Race to raise funds for conservation and research projects.
New Bins for New Birders (NB4NB)
Partnering with DVOC's World Series of Birding Team's corporate sponsor, Nikon Sport Optics, NB4NB is committed to supplying new, serviceable binoculars to organizations that expose young people to birding and the outdoors. We focus on those organizations that are local to the Delaware Valley Region: southeastern Pennsylvania, southern New Jersey, and Delaware.
You can quickly and easily make a donation to various DVOC initiatives using PayPal. Click the "Donate" button above to do see a list of initiatives. If you have a Paypal Account please log in. If you do not, use the "Don't have a PayPal account?" section in the lower left-hand corner of the page that appears after you click one of the "Donate" buttons on the next page.
The DVOC is a 501(c)(3) organization.
Contributions to DVOC are tax-deductible.