USFWS National Digital Library

- Bullfrog
- Amphibians; Wildlife refuges;
- Bullfrog at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Mallards
- Aquatic birds;
- Two mallard ducks at John Heinz National Wildlife Refuge, PA.
- Images
- Great Horned Owl
- Birds of prey; Wildlife refuges;
- Great horned owl at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Osprey
- Birds of prey; Wildlife refuges;
- Osprey at John Heniz National Wildlife Refuge, Philadelphia, PA.
- Images
- Bald Eagle
- Birds of prey; Wildlife refuges;
- Bald eagle at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Bald Eagle with Fish
- Birds of prey; Wildlife refuges;
- Bald eagle with fish in its talons at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Red-Tailed Hawk
- Birds of prey; Wildlife refuges;
- Red-tailed hawk at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Immature Bald Eagle
- Birds of prey; Wildlife refuges;
- Immature bald eagle at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Mallards
- Birds; Aquatic birds; Wildlife refuges;
- Female mallard ducks at John Heinz National Wildlife Refuge, PA.
- Images
- Two Bald Eagles with Chicks
- Birds; Birds of prey; Wildlife refuges;
- Two bald eagles with chicks at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Bald Eagle
- Birds; Birds of prey; Wildlife refuges;
- Bald eagle with young at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Ospreys
- Birds; Birds of prey; Wildlife refuges;
- Two ospreys at John Heinz National Wildlife Refuge, PA.
- Images
- Students Birdwatching
- Birds; Environmental education; Youth; Wildlife refuges;
- Philadelphia school students take part in an educational birdwalk at Tinicum marsh, John Heinz National Wildlife Refuge, PA.
- Images
- Students Birdwatching
- Birds; Environmental education; Youth; Wildlife refuges;
- Philadelphia school students take part in an educational birdwalk on Tinicum marsh at John Heinz National Wildlife Refuge, PA.
- Images
- Bird signage
- Birds; Signs; Wildlife refuges;
- A picture of bird signage at John Heinz National Wildlife Refuge at Tinicum.
- Images
- Great Blue Heron
- Birds; Species of concern; Wildlife refuges; Fishes;
- Great blue heron with fish in its beak at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Pine Warbler
- Birds; Trees; Wildlife refuges;
- Pine warbler on an evergreen branch at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Great Blue Heron with Big Fish
- Birds; Wading birds; Wildlife refuges; Fishes;
- Great blue heron holding large fish in its beak at John Heinz National Wildlife Refuge, Philadelphia, PA.
- Images
- Egrets at John Heinz NWR
- Birds; Wildlife refuges;
- Egrets feeding in the water at the John Heinz National Wildlife Refuge at Tinicum located in Pennsylvania.
- Images
- Chick in Nest
- Birds; Wildlife refuges;
- John Heinz National Wildlife Refuge, PA.
- Images