Willamette Valley Spring Migration Phenology

Western Oregon Birding Calendar

Western Oregon Birding Calendar

This calendar provides information on migrant phenology, to give an indication of when to look
for bird species to arrive.
Typical “fall” or “southbound” arrival (↓) dates and “spring” or “northbound” arrival (↑) dates are indicated by bird species names and arrow symbols in different colors, as explained in the key at the bottom of the calendar.

Please note the compiler’s acknowledgements below the calendar. These folks have put in a lot of work to make this information readily available. Also Joel Geier deserves an acknowledgement as well. He provided this data in multiple formats

Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Jan 22 Jan 23 Jan 24 Jan 25
↑Say’s Phoebe
Jan 26 Jan 27 Jan 28
Jan 29 Jan 30 Jan 31 Feb 1 Feb 2 Feb 3 Feb 4↑Tree Swallow
Feb 5 Feb 6 Feb 7 Feb 8 Feb 9
↑Tree Swallow↑Tree Swallow
Feb 10 Feb 11
Feb 12 Feb 13 Feb 14 Feb 15 Feb 16 Feb 17
↑Turkey Vulture
Feb 18
Feb 19 Feb 20
↑Sandhill Crane
Feb 21↑Rufous Hummingbird Feb 22
↑Turkey Vulture
Feb 23 Feb 24
↑Sandhill Crane
Feb 25
↑Rufous Hummingbird
Feb 26 Feb 27
↑Horned Grebe
Feb 28 Feb 29 Mar 1 Mar 2
↑Rufous Hummingbird
↑Violet-green Swallow
Mar 3
↑Violet-green Swallow
↑Violet-green Swallow
Mar 4
↑Cinnamon Teal
↑Say’s Phoebe
↑Turkey Vulture
Mar 5  Mar 6 Mar 7
↑Green Heron
Mar 8↑Say’s Phoebe Mar 9
↑Sandhill Crane
Mar 10
Mar 11 Mar 12↑Band-tailed Pigeon
↑Cinnamon Teal
↑Osprey
®Crested Caracara (2006)
Mar 13↑Band-tailed Pigeon  Mar 14 Mar 15 Mar 16
↑Osprey
Mar 17
Mar 18↑Orange-crowned Warbler Mar 19
↑Long-billed Dowitcher
↑Orange-crowned Warbler
Mar 20
↑Virginia Rail
Mar 21
↑Orange-crowned Warbler↑Cinnamon Teal
Mar 22
↑Osprey
Mar 23 Mar 24
Mar 25
↑Cliff Swallow
Mar 26 Mar 27
↑Common Yellowthroat
Mar 28↑Evening Grosbeak Mar 29 Mar 30↑Cliff Swallow
↑Barn Swallow
Mar 31
↑Barn Swallow
↑Long-billed Dowitcher
Apr 1
↑Northern Rough-winged Swallow
↑Chipping Sparrow↑Northern Rough-winged Swallow
Apr 2
↑Cliff Swallow
Apr 3
↑American Bittern
↑Yellow-headed Blackbird
Apr 4
↑Common Yellowthroat
↑Common Yellowthroat
↑Northern Rough-winged Swallow
Apr 5
↑Sora
↑Vesper Sparrow
↑Black-throated Gray Warbler
↑Black-throated Gray Warbler
Apr 6
↑Sora
↑Cassin’s Vireo
↑Greater Yellowlegs
Apr 7
↑Brown-headed Cowbird 
Apr 8
↑Brown-headed Cowbird
↑Barn Swallow
Apr 9↑Black Swift
↑Lesser Yellowlegs
↑Vaux’s Swift
↑Caspian Tern
Apr 10↑Black-throated Gray Warbler
↑Wilson’s Warbler
Apr 11
↑Chipping Sparrow↑House Wren
↑Purple Martin
Apr 12
↑Palm Warbler
↑Vesper Sparrow↑Cassin’s Vireo
↑Vaux’s Swift
Apr 13
↑Long-billed Curlew
↑Purple Martin
Apr 14
↑Black-bellied Plover
↑Nashville Warbler
Apr 15
↑Nashville Warbler
Apr 16
↑Yellow-headed Blackbird
Apr 17
↑Cassin’s Vireo
↑Hammond’s Flycatcher
Apr 18↑Willet
↑Wilson’s Warbler
↑Chipping Sparrow
Apr 19
↑Vaux’s Swift↑Pacific-slope Flycatcher
↑Hammond’s Flycatcher
↑Wilson’s Warbler
Apr 20
↑MacGillivray’s Warbler↑Nashville Warbler
↑House Wren
Apr 21
↑Black-necked Stilt
↑Yellow-headed Blackbird↑House Wren
↑Western Kingbird
Apr 22↑Hammond’s Flycatcher
↑Solitary Sandpiper
↑Warbling Vireo
↑Hermit Warbler
↑MacGillivray’s Warbler
Apr 23
↑Calliope Hummingbird
↑MacGillivray’s Warbler
↑Western Tanager
Apr 24
↑Semipalmated Plover
↑Warbling Vireo
↑Pacific-slope Flycatcher
↑Solitary Sandpiper
Apr 25
↑Caspian Tern
↑Bullock’s Oriole
↑Hermit Warbler
Apr 26
↑Western Kingbird
↑Warbling Vireo↑Western Tanager
↑Western Kingbird
↑Bullock’s Oriole
Apr 27
↑Pacific-slope Flycatcher↑Western Tanager
↑Black-headed Grosbeak
↑Olive-sided Flycatcher
↑Black-headed Grosbeak
↑Yellow Warbler
Apr 28
ASC Birdathon
↑Purple Martin
↑Hermit Warbler
↑Yellow Warbler↑Yellow Warbler
Apr 29
ASC Birdathon↑Dusky Flycatcher
↑Pectoral Sandpiper
↑Whimbrel
↑Blue-winged Teal
↑Calliope Hummingbird
Apr 30
↑Lazuli Bunting
↑Blue-winged Teal
May 1
↑Swainson’s Thrush
↑Dusky Flycatcher
May 2
↑Western Wood-Pewee
↑Olive-sided Flycatcher
↑Western Wood-Pewee
May 3
↑Swainson’s Thrush
↑Swainson’s Thrush↑Western Wood-Pewee
↑Black Tern
May 4
↑Black-headed Grosbeak↑Red-eyed Vireo
May 5
↑Blue-winged Teal↑Bullock’s Oriole
↑Grasshopper Sparrow
↑Lazuli Bunting
May 6
↑Lazuli Bunting
↑Yellow-breasted Chat
May 7↑Olive-sided Flycatcher May 8
↑Red-necked Phalarope
May 9
↑Wilson’s Phalarope
May 10 May 11
↑Yellow-breasted Chat
May 12
NAMC Migration Count
May 13
NAMC Migration Count
↑Forster’s Tern↑Willow Flycatcher
↑Yellow-breasted Chat
May 14
↑Marbled Godwit
↑Willow Flycatcher
May 15 May 16
↑Willow Flycatcher
May 17 May 18
↑Black Tern
↑Black-throated Sparrow
May 19
May 20
↑Black-chinned Hummingbird
May 21 May 22
↑White-faced Ibis
May 23 May 24 May 25 May 26
May 27 May 28
↑Eastern Kingbird
May 29 May 30 May 31
↑Red-eyed Vireo
Jun 1 Jun 2
↑Pacific Golden-Plover↑Common Nighthawk
Jun 3
↑Red-eyed Vireo
Jun 4
↑Common Nighthawk
Jun 5 Jun 6 Jun 7
↑Eastern Kingbird
Jun 8
↑Common Nighthawk
Jun 9
Key to symbols and colors used for bird arrival dates:
↑[species name] indicates “spring” arrivals of species that either nest in Oregon or continue northward.†
↓[species name] indicates “fall” arrivals of species that either winter in Oregon or continue southward.†
®[species name] indicates selected rarities (with year of occurrence in parentheses).
Note that dates may not correspond eactly in the case of leap-year records,
as this calendar is based on day numbers (number of days from Jan 1) in each year.Typical arrival dates for the Corvallis area based on
spring migrant phenology compiled by Alan McGie

plus a fall migrant phenology (draft in progress) compiled by Alan McGie and Joel Geier.

Typical arrival dates for the Eugene/Springfield area based on
spring migrant phenology compiled by Tom Mickel

Typical arrival dates for the Portland Metro area based on
spring migrant phenology compiled by Christopher & Adrian Hinkle

† The terms “northbound” and “southbound” are used here as generalizations;
many of Oregon’s migrants have an east/west component and/or elevational component to their movements.
The phenology for Willamette Valley locations includes arrivals of elevational migrants such as
Varied Thrush.

4 thoughts on “Willamette Valley Spring Migration Phenology

  1. Thank you so much Greg! Our primary interest is the Vaux’s Swifts in Eugene. My wife did some good goggling, we saw youtubes for the Eugene stop anywhere from Sept. 15 to 25th — which seems to fit pretty well with the 10-day span for the spring migration.

    Like this

  2. Fall migration phenology has now been added as separate page. However, the fall phenology for the mid-valley hasn’t been sorted out as well as spring. Please see that page for attributions and caveats regarding the data.

    Like this

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