Table 2. Detection frequency of 48 species of birds grouped according to nesting guild and recorded at point-count stations in the Greater Vancouver area, 1997–1998. The maximum relative abundance is the highest abundance recorded over the two study years at each site, averaged over all sites occupied by a particular species. Boldface species and guilds were used for logistic regression analysis.

Guild
and code
Common name
Scientific name
No. sites
detecteda
Maximum relative abundance on occupied sites
BUILDING

 
   BASW
Barn Swallow
Hirundo rustica
 31
2.32
   EUST
European Starling
Sturnus vulgaris
223
4.17
   HOSP
House Sparrow
Passer domesticus
205
4.41
   RODO
Rock Dove
Columba livia
 76
3.24
   VGSW
Violet-green Swallow
Tachycineta thalassina
105
2.54
 
   Guild total

257

 
DECIDUOUS TREE

 
   AMRO
American Robin
Turdus migratorius
186
1.72
   BHGR*
Black-headed Grosbeak
Pheucticus melanocephalus
  2
1.00
   BUSH
Bushtit
Psaltriparus minimus
 57
3.21
   CEWA
Cedar Waxwing
Bombycilla cedrorum
 22
1.14
   HOFI
House Finch
Carpodacus mexicanus
190
2.20
   REVI*
Red-eyed Vireo
Vireo olivaceus
  2
1.50
   HUVI*
Hutton's Vireo
Vireo huttoni
(1997)

   MODO*
Mourning Dove
Zenaida macroura
(1998)

   RTHA*
Red-tailed Hawk
Buteo jamaicensis
(1998)

   WEFL*
Western Flycatcher
Empidonax difficilis
(1997)

 
   Guild total

255

 
CONIFEROUS

 
   NOCR
Northwestern Crow
Corvus caurinus
219
2.10
 
TREE

 
   PISI
Pine Siskin
Carduelis pinus
 19
1.26
   RCKI
Ruby-crowned Kinglet
Regulus calendula
  8
1.50
   RUHU
Rufous Hummingbird
Selasphorus rufus
 12
1.17
   STJA
Steller’s Jay
Cyanocitta stelleri
 12
1.17
   BTPI*
Band-tailed Pigeon
Columba fasciata
(1997)

   BTGWA*
Black-throated Gray Warbler
Dendroica nigrescens
(1998)

 
   Guild total

240

 
GROUND

 
   BHCO
Brown-headed Cowbird
Molothrus ater
 38
1.42
   CAGO*
Canada Goose
Branta canadensis
  4
1.75
   DEJU
Dark-eyed Junco
Junco hyemalis
 32
1.19
   FOSP*
Fox Sparrow
Passerella species
  3
1.00
   OCWA
Orange-crowned Warbler
Vermivora celata
 15
1.20
   SOSP
Song Sparrow
Melospiza melodia
 38
1.68
   SPTO
Spotted Towhee
Pipilo maculatus
 87
1.62
   WIWA*
Wilson's Warbler
Wilsonia pusilla
  5
1.00
   GCSP*
Golden-crowned Sparrow
Zonotrichia atricapilla
(1998)

   KILL*
Killdeer
Charadrius vociferus
(1998)

   MALL*
Mallard
Anas platyrhynchos
(1998)

 
   Guild total

124

 
SHRUB

 
   AMGO
American Goldfinch
Carduelis tristis
 25
1.24
   COYE*
Common Yellowthroat
Geothlypis trichas
  3
1.00
   SWTH
Swainson's Thrush
Catharus ustalutus
 23
1.39
   WCSP
White-crowned Sparrow
Zonotrichia leucophrys
 50
1.34
   WIFL
Willow Flycatcher
Empidonax trailii
  6
1.00
 
   Guild total

 87

 
CAVITY

 
   BCCH
Black-capped Chickadee
Poecile atricapillus
160
1.99
   NOFL*
Northern Flicker
Colaptes auratus
  3
1.00
   RBNU*
Red-breasted Nuthatch
Sitta canadensis
  4
1.00
   WIWR
Winter Wren
Troglodytes troglodytes
 13
1.23
 
   Guild total

166

 
LEDGE/CLIFF
 
   GWGU*
Glaucous-winged Gull
Larus glaucescens


   [MEGU*]
Mew Gull
Larus canus


   RBGU*
Ring-billed Gull
Larus delawarensis


   CORA*
Common Raven
Corvus corax
(1998)

 
   Guild total

 54

 
RIPARIAN
 
   RWBL*
Red-winged Blackbird
Agelaius phoeniceus
(1998)

   [SORA*]
Sora Rail
Porzana carolina
(1998)

   Notes: Asterisks indicate species excluded from the analysis (n = 23). Brackets indicate species not modeled. Underlining indicates introduced species.

   a (1997) indicates species recorded in the 1997 season only (n = 2); (1998) indicates species recorded in the 1998 season only (n = 10).