Table 3. Bird species recorded during census periods.

Birds were recorded by sight or by vocalizations from May 28–June 5, 2007 in sugar maple (Acer saccharum Marsh.) stands of the Morgan Arboretum, within 100 m of plots used for predator exclusion trials. Percent relative abundance was calculated as the number of records for a given species divided by the total number of records.

Common name	Scientific name	Records	Rel. abd. (%)
Yellow-bellied Sapsucker	Sphyrapicus varius	21	5.7
Downy Woodpecker	Picoides pubescens	2	0.5
Northern Flicker	Colaptes auratus	5	1.4
Pileated Woodpecker	Dryocopus pileatus	5	1.3
Eastern Wood-Peewee	Contopus virens	8	2.2
Great-crested Flycatcher	Myiarchus crinitus	14	3.8
Empidonax Flycatcher	Empidonax sp.	1	0.3
Philadelphia Vireo	Vireo philadelphicus	18	4.9
Warbling Vireo	Vireo gilvus	1	0.3
Red-eyed Vireo	Vireo olivaceus	39	10.5
Bluejay	Cyanocitta cristata	10	2.7
American Crow	Corvus brachyrhynchos	44	11.9
Black-capped Chickadee	Poecile atricapillus	26	7.0
White-breasted Nuthatch	Sitta carolinensis	1	0.3
Veery	Catharus fuscescens	7	1.9
American Robin	Turdus migratorius	3	0.8
Northern Parula	Setophaga americana	15	4.1
Yellow Warbler	Setophaga petechia	1	0.3
Chestnut-sided Warbler	Setophaga pensylvanica	12	3.2
Magnolia Warbler	Setophaga magnolia	1	0.3
Cape May Warbler	Setophaga tigrina	1	0.3
Black-throated Green Warbler	Setophaga virens	27	7.3
Warbler sp.	Setophaga sp.	2	0.5
Black-and-white Warbler	Mniotilta varia	2	0.5
Ovenbird	Seiurus aurocapilla	39	10.5
Scarlet Tanager	Piranga olivacea	1	0.3
Rose-breasted Grosbeak	Pheuticus ludovicianus	4	1.1
Northern Cardinal	Cardinalis cardinalis	3	0.8
Chipping Sparrow	Spizella passerina	1	0.3
Red-winged Blackbird	Agelaius phoeniceus	9	2.4
American Goldfinch	Carduelis tristis	47	12.7