Insights: Migration

Seasonal trends and migration tracking.
In plain English
  • 12 species arrived in the last two weeks after being absent — most recently Cackling Goose.
  • Pileated Woodpecker has gone quiet: last heard 21 days ago after 29 detections — 5 regulars are on this list.
  • 30-day diversity is Moderate (Shannon index 1.288), up 43 species compared with this month last year.

🦅 Migration & Seasonal Patterns

🆕 New Arrivals (Last 14 Days) iSpecies appearing in the last 14 days that were absent for the previous 2 weeks. Useful for tracking return migration.
Cackling Goose
First seen: Sep 24
1 detections
American Coot
First seen: Sep 24
1 detections
Common Redpoll
First seen: Sep 22
3 detections
Great Blue Heron
First seen: Sep 22
1 detections
Evening Grosbeak
First seen: Sep 21
22 detections
Golden-crowned Kinglet
First seen: Sep 21
1 detections
Yellow-rumped Warbler
First seen: Sep 20
1 detections
Bohemian Waxwing
First seen: Sep 18
2 detections
Mountain Chickadee
First seen: Sep 18
1 detections
Common Goldeneye
First seen: Sep 17
3 detections
Dark-eyed Junco
First seen: Sep 15
1 detections
White-throated Sparrow
First seen: Sep 13
11 detections
🔇 Gone Quiet iRegular residents that haven't been detected in at least 14 days. This may indicate they have migrated away or changed territories.
Pileated Woodpecker
29 total · Last: Sep 6
21d ago
Merlin
23 total · Last: Aug 30
28d ago
American Tree Sparrow
5 total · Last: Aug 24
34d ago
European Starling
11 total · Last: Aug 22
36d ago
Solitary Sandpiper
5 total · Last: Aug 16
42d ago
📅 Year-over-Year Arrival Comparison (2025 vs 2026) iTracking if migratory species arrived earlier or later than they did in the previous calendar year.
Not enough multi-year data yet —
🗓️ Seasonal Presence iClassification Guide:
• Year-round: Detected across 9+ months
• Seasonal: Detected across 3-8 months
• Transient: Detected <3 months

Data Accuracy Disclaimer:
These classifications may be inaccurate if the station has been running for less than a full year, as it lacks seasonal historical context.

Bar height is expected frequency. Purple highlights are actual detections.
Black-billed Magpie
11,470 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
House Sparrow
1,853 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
House Finch
813 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Red-breasted Nuthatch
490 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Crow
369 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Northern Flicker
338 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Common Grackle
332 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Green-winged Teal
152 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Pine Siskin
49 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Mallard
39 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Common Raven
38 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Pileated Woodpecker
29 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Merlin
23 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Evening Grosbeak
22 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Canada Goose
21 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Ring-necked Pheasant
20 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Robin
18 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Ring-billed Gull
15 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
White-breasted Nuthatch
13 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Gadwall
12 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Greater White-fronted Goose
12 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Downy Woodpecker
11 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
European Starling
11 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
White-throated Sparrow
11 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Black-capped Chickadee
9 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Cedar Waxwing
9 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Goldfinch
8 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Blue Jay
8 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Tree Sparrow
5 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Common Loon
5 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Solitary Sandpiper
5 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
White-crowned Sparrow
5 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Belted Kingfisher
4 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Common Goldeneye
3 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Common Redpoll
3 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Lapland Longspur
3 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Kestrel
2 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Bohemian Waxwing
2 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Brewer's Blackbird
2 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Red-tailed Hawk
2 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Tundra Swan
2 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
American Coot
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Cackling Goose
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Dark-eyed Junco
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Golden-crowned Kinglet
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Great Blue Heron
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Killdeer
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Mountain Chickadee
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Orange-crowned Warbler
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D
Pied-billed Grebe
1 detections Transient
J
F
M
A
M
J
J
A
S
O
N
D