Field Notes · Catnum 165782 · score 9 — moderate uncertainty
Nest built upon under girder 6 inches under, inside a cross beam, in a long wood bridge across Pennypack Creek, 5.0 feet from ground and within 6 inches of floor and as close to outer side, under foot walk. Double nest one built inside the other, an empty wall of grass stems and blades and mud, thirdly lined with dry soft grass blades. Line of demarcation between nests barely discernible. Width outside 4 3/8 inches - inside 3 3/8 inches depth 3 3/4 inches - 1 3/4 inches.
Metadata · Catnum 165782
Date11 May 1904
LocalityHolmesburg, Philadelphia, Pennsylvania, USA
Coordinates40.0525848, -75.0391531 ↗ map
CollectorMiller, Richard F.
Eggs in Set7
Specimen TypeE
Incubationunknown
Identificationpositive (transcribed as “Positive identification”)
Nest Height1.52 m (5.0 feet)
Nest Supportunder girder, inside a cross beam
Nest Materialsgrass stems, grass blades, mud
Nest Liningdry soft grass blades
Near Waterabove water
Nest Settingwood bridge across Pennypack Creek
Nest NotesDouble nest one built inside the other, an empty wall. Line of demarcation between nests barely discernible. Width outside 4 3/8 inches - inside 3 3/8 inches, depth 3 3/4 inches - 1 3/4 inches. Located 6 inches under girder, within 6 inches of floor and as close to outer side, under foot walk.
Further Details761 | 7-Jan
✦ Anecdote
This record describes an unusual double nest construction where one nest was built inside another, with the line of demarcation between the two nests barely visible.