Field Notes · Catnum 240056 · score 30 — high uncertainty
5/30 17:34 - in huge barberry at corner & SE corner conservation field on N side near edge bush - partial cattail type nest no lining. 6/2 17:00 - looks complete, well formed cup empty. 6/4 4:53 - same. 6/7 c. 6:30 PM - no warm - cold egg. 6/9 11:10 - 3 eggs - warm. 6/10 10:35 - 2 eggs warm - cattail nearly white. 6/11 10:51 - one egg warm - no human - think I heard a bird come off nest. 6/12 1:17 - 2 warm eggs gone. C.B. flew from clump when I was 20-30 away. 6/18 17:17 - one egg has 6 day gash until sun and has heard bush move. 6/21 c. 4:00 PM - same. no further burrow. egg pipped.
Metadata · Catnum 240056
Date09 Jun 1967
LocalityNew Haven, Connecticut, USA
CollectorRothstein, Steve
Eggs in Set3
Specimen TypeE
Incubationnear hatching
Identificationflushed
Nest Supportbarberry
Nest Materialscattail type nest
Nest Liningno lining
Nest SettingSE corner conservation field on N side near edge bush
Nest NotesNest found 5/30, completed by 6/2, eggs laid between 6/7-6/9, clutch size varied from 1-3 eggs during observation period, one egg pipped by 6/21
Headerfield N/PS-10
Further Details240-056 | 67-140
✦ Anecdote
This record shows unusual clutch instability with egg counts fluctuating between 1-3 eggs over the observation period, suggesting possible predation or disturbance, and documents the complete nesting cycle from construction through egg pipping over 22 days.