Field Notes · Catnum 240004 · score 28 — high uncertainty
Catbird May 30 removed 3 eggs and put in 3 phalarope eggs experiment I - 5 (4) - Xallen 29 min. - 6 69-276 Powder with Deer Fat May 22 2:25 PM 6.5 feet up in weed box in barrel 30° NNE / junction dead 4 times in 15° NNE / large dead rose over egg 5/30. 10:28 AM 4° warm egg removed 3 eggs and put in 3 shoveler eggs 10:57 AM one gathered egg - put back 2 others and kept last one [23.58 x 17.97 small embryo present.] June 5. 10:11 AM 3 eggs Barnest 1 left removed. bob before she could cover eggs.
Metadata · Catnum 240004
Date30 May 1969
LocalityNew Haven, Connecticut, USA
CollectorRothstein, Steve
Eggs in Set4
Specimen TypeE
Incubationslight
Identificationunknown
Nest Height1.98 m (6.5 feet)
Nest Supportweed box in barrel
Nest NotesExperimental manipulation involving removal of catbird eggs and substitution with phalarope and shoveler eggs. Multiple visits documenting egg exchanges and incubation progress.
HeaderRECEIVED BY WESTERN FOUNDATION OF VERTEBRATE ZOOLOGY FROM COLLECTION OF
Further Details69-276
✦ Anecdote
This record documents an experimental egg substitution study where the researcher systematically removed catbird eggs and replaced them with eggs from other species (phalarope and shoveler), tracking the bird's response over multiple visits.