WhenToBird

Pica hudsonia · Corvidae

When Do Black-billed Magpies Arrive in Alaska?

Adult Black-billed Magpie
Photo: Mayela y Ramón, CC BY-SA 4.0 via iNaturalist

Black-billed Magpies are in Alaska all year, but most are here in winter: numbers build from late September, peak in late October (37% of checklists), and fall back by early April. In the quietest week (late June) they are still on about 13% of checklists.

When to look

Numbers buildSep 22-30late September
PeakOct 22-31late October
Fall back byApr 1-7early April
FewestJun 22-30late June

Best: late October. Here all year; numbers build from late September and fall back by early April. Peak: on about 37% of Alaska checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Juluncommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

Darker months: more checklists report it. Outlined: peak month.

0%10%20%30%40%Jan 1-7: 32% of 3788 checklistsJan 8-14: 34% of 2852 checklistsJan 15-21: 33% of 2810 checklistsJan 22-31: 33% of 3629 checklistsFeb 1-7: 30% of 2519 checklistsFeb 8-14: 33% of 2927 checklistsFeb 15-21: 31% of 3743 checklistsFeb 22-28: 31% of 2846 checklistsMar 1-7: 31% of 2904 checklistsMar 8-14: 31% of 3073 checklistsMar 15-21: 29% of 3359 checklistsMar 22-31: 30% of 5855 checklistsApr 1-7: 27% of 4329 checklistsApr 8-14: 24% of 4949 checklistsApr 15-21: 22% of 7114 checklistsApr 22-30: 20% of 10916 checklistsMay 1-7: 18% of 11827 checklistsMay 8-14: 17% of 14115 checklistsMay 15-21: 17% of 12152 checklistsMay 22-31: 16% of 19919 checklistsJun 1-7: 14% of 15816 checklistsJun 8-14: 13% of 17194 checklistsJun 15-21: 12% of 15943 checklistsJun 22-30: 14% of 16192 checklistsJul 1-7: 12% of 9815 checklistsJul 8-14: 14% of 8263 checklistsJul 15-21: 14% of 7081 checklistsJul 22-31: 14% of 9434 checklistsAug 1-7: 16% of 6380 checklistsAug 8-14: 14% of 6258 checklistsAug 15-21: 15% of 6114 checklistsAug 22-31: 17% of 8189 checklistsSep 1-7: 19% of 5848 checklistsSep 8-14: 23% of 4853 checklistsSep 15-21: 24% of 4415 checklistsSep 22-30: 27% of 5086 checklistsOct 1-7: 34% of 3576 checklistsOct 8-14: 32% of 4212 checklistsOct 15-21: 38% of 3339 checklistsOct 22-31: 37% of 4169 checklistsNov 1-7: 35% of 2844 checklistsNov 8-14: 36% of 2753 checklistsNov 15-21: 33% of 2291 checklistsNov 22-30: 34% of 3066 checklistsDec 1-7: 33% of 2199 checklistsDec 8-14: 33% of 2472 checklistsDec 15-21: 31% of 3071 checklistsDec 22-31: 33% of 3442 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in Alaska that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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Where in Alaska

Best counties

Share of checklists at the peak
  1. Haines BoroughBest early March · 14 checklists that week, 1,690 in all68%
  2. Anchorage MunicipalityBest mid October · 828 checklists that week, 65,703 in all64%
  3. Kodiak Island BoroughBest the second week of November · 202 checklists that week, 11,483 in all63%
  4. Skagway MunicipalityBest the second week of November · 12 checklists that week, 2,045 in all60%
  5. Denali BoroughBest mid February · 25 checklists that week, 6,287 in all55%
  6. Matanuska-Susitna BoroughBest late October · 316 checklists that week, 23,028 in all54%

Best spots

Share of checklists at the peak
  1. The Cuddy Family Mid-Town ParkAnchorage Municipality, best early April · 45 checklists that week, 598 in all97%
  2. Chester Creek Greenbelt (Thompson)Anchorage Municipality, best late March · 28 checklists that week, 448 in all95%
  3. Chester Creek Greenbelt (Westchester Lake)Anchorage Municipality, best early March · 27 checklists that week, 2,640 in all93%
  4. Ship Creek Overlook ParkAnchorage Municipality, best late March · 20 checklists that week, 381 in all90%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In Alaska, the Black-billed Magpie is most often listed on checklists started between 11 am and 1 pm (24% of those checklists).

0%10%20%30%12 am: too few checklists (549) to judge1 am: too few checklists (365) to judge2 am: too few checklists (291) to judge3 am: too few checklists (624) to judge4 am: too few checklists (1241) to judge5 am: too few checklists (3532) to judge6 am: 16% of 9751 checklists7 am: 18% of 17236 checklists8 am: 20% of 24936 checklists9 am: 22% of 30139 checklists10 am: 23% of 30866 checklists11 am: 24% of 28207 checklists12 pm: 23% of 25650 checklists1 pm: 23% of 24144 checklists2 pm: 22% of 23323 checklists3 pm: 22% of 20763 checklists4 pm: 20% of 18245 checklists5 pm: 19% of 14895 checklists6 pm: 18% of 11707 checklists7 pm: 16% of 9365 checklists8 pm: 13% of 6934 checklists9 pm: too few checklists (4176) to judge10 pm: too few checklists (2050) to judge11 pm: too few checklists (952) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January32%34%33%33%
February30%33%31%31%
March31%31%29%30%
April27%24%22%20%
May18%17%17%16%
June14%13%12%14%
July12%14%14%14%
August16%14%15%17%
September19%23%24%27%
October34%32%38%37%
November35%36%33%34%
December33%33%31%33%

Neighboring states

  • Washington: arrives mid August, 5 weeks earlier than Alaska
  • Oregon: arrives the second week of August, 6 weeks earlier than Alaska
  • Idaho: year-round, peaks mid November
  • Montana: year-round, peaks the second week of December

Common questions

When do Black-billed Magpies arrive in Alaska?
Black-billed Magpies are in Alaska all year, but most are here in winter: numbers build from late September, peak in late October (37% of checklists), and fall back by early April. In the quietest week (late June) they are still on about 13% of checklists.
When do Black-billed Magpies leave Alaska?
Black-billed Magpies never fully leave Alaska: numbers fall back below half their usual rate by early April, but some are still reported in every week, about 13% of checklists at the low.
When is the best time to see a Black-billed Magpie in Alaska?
The Black-billed Magpie is reported most often in late October, on about 37% of Alaska checklists.
Where in Alaska are Black-billed Magpies seen most often?
By county, Haines Borough, Anchorage Municipality, and Kodiak Island Borough have the highest peak reporting rates for the Black-billed Magpie (counties with at least 200 checklists).