Add to ORKGCliff Swallow nests are seen in chalk beds in this undated photo.https://scholars.fhsu.edu/wooster/1882/thumbnail.jp
Chalk Beds near Castle Rock. This black and white photo shows some chalk beds near Castle Rock. A to...
The cliff swallow bug is a nest-dwelling, polyphagous ectoparasite of the cliff swallow Hirundo pyrr...
Birds nests nestled in Pyramid Rocks.https://scholars.fhsu.edu/wooster/1500/thumbnail.jp
Cliff Swallow nests are seen in chalk beds in this photo from June 1950.https://scholars.fhsu.edu/wo...
Cliff Swallows fly around their nests in chalk beds in this photo from June 1950.https://scholars.fh...
Cliff swallow mud nests near Castle Rock. Photo taken in July 1927.https://scholars.fhsu.edu/wooster...
Cliff Swallow nests are seen in this photo from the summer of 1953.https://scholars.fhsu.edu/wooster...
Photo by P. T. Reilly showing cliff swallow nests on canyon walls, probably in Glen Canyon region, s...
Eight members of the swallow family Hirundinidae breed in North America: the tree swallow (Tachycine...
Cliff swallows (Petrochelidon pyrrhonota) nesting in colonies on man-made structures can cause aesth...
Swallow, Cliff. Four Nests under the Eaves of a Barn. Photographed by Arthur A. Allen. Chazy, New Yo...
Cliff swallows (Petrochelidon pyrrhonota) nesting in colonies on man-made structures can cause aesth...
Cliff swallow nests above visitor center door - Wichital Mountain Wildlife Refuge, Lawton, O
Cliff swallow droppings under their nests located above visitor center door - Wichita Mountain Wildl...
Photograph of a cave swallow nest, taken at Indian Lodge in Davis Mountains State Park
Chalk Beds near Castle Rock. This black and white photo shows some chalk beds near Castle Rock. A to...
The cliff swallow bug is a nest-dwelling, polyphagous ectoparasite of the cliff swallow Hirundo pyrr...
Birds nests nestled in Pyramid Rocks.https://scholars.fhsu.edu/wooster/1500/thumbnail.jp
Cliff Swallow nests are seen in chalk beds in this photo from June 1950.https://scholars.fhsu.edu/wo...
Cliff Swallows fly around their nests in chalk beds in this photo from June 1950.https://scholars.fh...
Cliff swallow mud nests near Castle Rock. Photo taken in July 1927.https://scholars.fhsu.edu/wooster...
Cliff Swallow nests are seen in this photo from the summer of 1953.https://scholars.fhsu.edu/wooster...
Photo by P. T. Reilly showing cliff swallow nests on canyon walls, probably in Glen Canyon region, s...
Eight members of the swallow family Hirundinidae breed in North America: the tree swallow (Tachycine...
Cliff swallows (Petrochelidon pyrrhonota) nesting in colonies on man-made structures can cause aesth...
Swallow, Cliff. Four Nests under the Eaves of a Barn. Photographed by Arthur A. Allen. Chazy, New Yo...
Cliff swallows (Petrochelidon pyrrhonota) nesting in colonies on man-made structures can cause aesth...
Cliff swallow nests above visitor center door - Wichital Mountain Wildlife Refuge, Lawton, O
Cliff swallow droppings under their nests located above visitor center door - Wichita Mountain Wildl...
Photograph of a cave swallow nest, taken at Indian Lodge in Davis Mountains State Park
Chalk Beds near Castle Rock. This black and white photo shows some chalk beds near Castle Rock. A to...
The cliff swallow bug is a nest-dwelling, polyphagous ectoparasite of the cliff swallow Hirundo pyrr...
Birds nests nestled in Pyramid Rocks.https://scholars.fhsu.edu/wooster/1500/thumbnail.jp