Field Notes · Catnum 240050 · score 32 — high uncertainty
Powder. Arbors S. | Removed 4 warm eggs - added 30 - one CB control | 1:34 returned to nest looked at 1 then flew away (didn't seem to be frightened) | 1:50 was near nest then flew away don't think it looked in nest | watched nest one and a half to three and a half hours temps are 2 CB near nest then 60° - land was able to see the nest. don't think they were settled on eggs | 8:00 pm: all 4 eggs warm no bruises | 9:40 AM only CB control - no bruises warm under nest | 9:56 AM some cold to warm, ruled (can't tell whether still incubating) | 10:03 AM some cold to warm - cold no bruises dry but maybe protected from rain by one head foliage (probably not being incubated) | 11:38 AM some heavily bruised damp white warm. cold removed and numbered egg | 22.21 x 17.37, A 22.46 x 17.42, B 21.80 x 16.40, C 22.84 x 17.47 4 badly decomposed embryos present. egg A broke, not saved
Metadata · Catnum 240050
Date01 Jun 1970
LocalityNew Haven, Connecticut, USA
CollectorRothstein, Steve
Eggs in Set4
Specimen TypeE
Incubationadvanced
Identificationbird seen
Nest SettingPowder. Arbors
Nest NotesExperimental manipulation involving removal of original eggs and addition of control eggs. Bird observed returning to nest multiple times with varying responses. Temperature monitoring conducted.
Further Details240,050 | 70-50
✦ Anecdote
This record documents an experimental manipulation where the collector removed the original 4 eggs and replaced them with 30 control eggs, then monitored the bird's behavioral response and egg condition over multiple observation periods.