Field Notes · Catnum 240019 · score 38 — high uncertainty
May 23, 10:28 AM complete CB. 6½ feet up on laurel WNW corner of lot - just west of start of road to Dunbar are two large cedars on either side of road - 12 feet south of cedar on south side is another large cedar in laurels nests 7 feet ESE of other cedar. May 24, 7:23 AM one cold egg 9:18 PM one C [22.98 x 17.02 SIBLEY] 7:50 PM just C in nest no bruises cold to warm - old CB on nest. May 25, 8:57 AM just one CB cowbird egg in nest C gone (bird on nest CB was there only a few seconds). June 5, 10:08 AM 3 warm eggs removed one and put in CB control - each so white shelled as collected 2 CB 1 H [23.58 x 17.34 large embryo present] 5:27 AM 2 eggs 1 CB cold no bruises CB on nest. June 6, 11:19 AM same warm CB on nest. June 9, 9:06 AM 2 dummies + 0 CB on nest another CB no bruises - removed.
Metadata · Catnum 240019
Date24 May 1969
LocalityNew Haven, Connecticut, USA
CollectorRothstein, Steve
Eggs in Set4
Specimen TypeE
Incubationadvanced
Identificationbird on nest
Nest Height1.98 m (6.5 feet)
Nest Supportlaurel
Nest SettingWNW corner of lot, west of start of road to Dunbar, among large cedars and laurels
Nest NotesLocated 7 feet ESE of large cedar on south side of road, between two large cedars. Multiple visits documented from May 23 to June 9. Cowbird parasitism observed with cowbird egg found in nest on May 25.
Further Details240019 | 69-223
✦ Anecdote
This record documents cowbird parasitism of a Gray Catbird nest, with the collector noting the presence of a cowbird egg that replaced one of the original catbird eggs, and includes detailed measurements and embryonic development observations across multiple visits.