Continental Summary
Scattered light to moderate flights were the later period highlights in the West, while moderate to very heavy flights graced the later period in the East.
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Upper Midwest and Northeast |
Gulf Coast and Southeast |
Great Plains |
West |
Upper Midwest and Northeast
A moderate to locally heavy flight, primarily east of the Appalachians, was the highlight of the weekend action to begin the period. The days that followed saw locally moderate and isolated heavy flights, but nowhere were flights intense and extensive. However, the passage of a frontal boundary spawned moderate to locally very heavy flights on Tuesday night west of the Appalachians and more regionally widespread where precipitation was not falling by Wednesday night. As the system finally geared up and organized itself to depart the region by Friday, locally moderate to heavy flights took off to the west of the frontal boundary. To the east, heavy rain and southerly flow kept most migrants on the ground.
Top Movers
Increasing
| Species | Increase from Last Week | % of Checklists Reporting |
|---|---|---|
| Snow Bunting | 428% | 1.5 |
| Bonaparte's Gull | 82% | 4 |
| Gadwall | 53% | 6.3 |
| Eurasian Wigeon | 343% | 1 |
| Bufflehead | 68% | 2.4 |
| Brant | 60% | 3 |
| American Tree Sparrow | 50% | 2.8 |
| Ruddy Duck | 36% | 7.1 |
| Short-eared Owl | 722% | 0.3 |
| Hooded Merganser | 56% | 2.5 |
| Common Merganser | 53% | 3.4 |
| Common Loon | 39% | 5.4 |
| Lesser Scaup | 54% | 2.1 |
| Snow Goose | 124% | 1.2 |
| Ring-necked Duck | 36% | 3.5 |
| Long-tailed Duck | 56% | 1.1 |
| Horned Grebe | 48% | 2 |
| Great Black-backed Gull | 24% | 8.5 |
| Fox Sparrow | 35% | 2.8 |
| Northern Shrike | 100% | 0.2 |
| Red-breasted Merganser | 37% | 2.1 |
| American Wigeon | 22% | 4.6 |
| Rough-legged Hawk | 71% | 0.2 |
Decreasing
| Species | Decrease from Last Week | % of Checklists Reporting |
|---|---|---|
| Palm Warbler | -54% | 5.1 |
| Gray Catbird | -63% | 3.4 |
| Common Yellowthroat | -72% | 1.1 |
| Chimney Swift | -76% | 0.6 |
| Eastern Phoebe | -46% | 8.1 |
| Nashville Warbler | -73% | 0.5 |
| Black-throated Blue Warbler | -67% | 0.6 |
| House Wren | -68% | 0.7 |
| Blue-headed Vireo | -50% | 2 |
| Black-throated Green Warbler | -86% | 0.2 |
| White-crowned Sparrow | -40% | 6.7 |
| Swainson's Thrush | -98% | 0 |
| Lincoln's Sparrow | -48% | 2.2 |
| Blackpoll Warbler | -46% | 2.5 |
| Savannah Sparrow | -42% | 5.2 |
| Yellow-rumped Warbler | -30% | 25.1 |
| Indigo Bunting | -83% | 0.2 |
| Orange-crowned Warbler | -58% | 0.9 |
| Northern Parula | -95% | 0 |
| Ruby-crowned Kinglet | -28% | 17.6 |
| Chipping Sparrow | -28% | 8.3 |
| Pine Warbler | -54% | 0.8 |
| Tennessee Warbler | -60% | 0.6 |
| Magnolia Warbler | -100% | 0 |
| Cape May Warbler | -84% | 0.1 |
Gulf Coast and Southeast
Most of the period featured scattered light to moderate flights, with isolated pockets of heavy movements. These isolated heavy flights were mostly late in the work week, associated with the approach and slow passage of a frontal boundary. But it was not until Thursday night the more widespread favorable migration conditions arrived. These were mostly west of the Mississippi River, where moderate to locally very heavy flights occurred, while more moderate and highly isolated heavy flights were apparent to the east.
Top Movers
Increasing
| Species | Increase from Last Week | % of Checklists Reporting |
|---|---|---|
| Savannah Sparrow | 108% | 8.6 |
| Yellow-rumped Warbler | 111% | 31 |
| Hermit Thrush | 109% | 3.5 |
| White-throated Sparrow | 70% | 11.9 |
| Common Loon | 2616% | 1 |
| Eastern Meadowlark | 74% | 8.5 |
| Golden-crowned Kinglet | 62% | 9.3 |
| Ring-necked Duck | 126% | 1.6 |
| Ruby-crowned Kinglet | 62% | 23.5 |
| Gadwall | 46% | 3.9 |
| Swamp Sparrow | 47% | 7.8 |
| Glossy Ibis | 76% | 4.2 |
| Orange-crowned Warbler | 45% | 5.1 |
| Redhead | 91% | 1.5 |
| Red-breasted Nuthatch | 74% | 4.2 |
| American Pipit | 146% | 1.1 |
| Common Grackle | 35% | 18.3 |
| Field Sparrow | 46% | 3.7 |
| House Wren | 24% | 16.3 |
| Winter Wren | 81% | 2.3 |
| Lincoln's Sparrow | 41% | 3.1 |
| Song Sparrow | 22% | 11.8 |
| Brewer's Blackbird | 134% | 0.7 |
Decreasing
| Species | Decrease from Last Week | % of Checklists Reporting |
|---|---|---|
| Chimney Swift | -81% | 1.1 |
| Rose-breasted Grosbeak | -77% | 1.1 |
| Magnolia Warbler | -62% | 2.9 |
| American Redstart | -60% | 3.5 |
| Swainson's Thrush | -76% | 0.8 |
| Scarlet Tanager | -81% | 0.3 |
| Cape May Warbler | -66% | 1 |
| Red-eyed Vireo | -75% | 0.8 |
| Wood Thrush | -76% | 0.4 |
| Tennessee Warbler | -58% | 2.7 |
| Eastern Wood-Pewee | -60% | 2.3 |
| White-breasted Nuthatch | -51% | 6.6 |
| Hooded Warbler | -76% | 0.4 |
| Black-throated Blue Warbler | -62% | 1.8 |
| Chestnut-sided Warbler | -82% | 0.3 |
| Yellow Warbler | -84% | 0.2 |
| Gray-cheeked Thrush | -83% | 0.1 |
| Ovenbird | -47% | 1.7 |
| Blackpoll Warbler | -67% | 0.4 |
| White-eyed Vireo | -41% | 6.9 |
| Northern Parula | -39% | 4.6 |
| Bay-breasted Warbler | -51% | 1 |
| Summer Tanager | -68% | 0.5 |
| Hairy Woodpecker | -41% | 2.4 |
Great Plains
After the weekend’s scattered light to moderate flights in mostly marginal migration conditions, favorable conditions arrived as low pressure drifted east through the region. Moderate to heavy flights highlighted portions of the northern and central Plains migration scene by Monday night. And Tuesday and Wednesday night saw these become more widespread and intense, albeit with a decidedly eastern Plains distribution. As the frontal boundary moved farther to the east, and the high pressure center passed over the region, migration was primarily light to moderate and almost exclusively in the eastern reaches of the central and southern Plains.
Top Movers
Increasing
| Species | Increase from Last Week | % of Checklists Reporting |
|---|---|---|
| Rusty Blackbird | -882% | 3 |
| Carolina Wren | 121% | 30 |
| Le Conte's Sparrow | 237% | 8.1 |
| Red-shouldered Hawk | 184% | 10.3 |
| White-winged Dove | 1021% | 2.4 |
| Dark-eyed Junco | 54% | 36.7 |
| European Starling | 62% | 47.3 |
| Northern Flicker | 65% | 48.8 |
| House Finch | 76% | 26.4 |
| Bewick's Wren | 137% | 3.8 |
| Greater White-fronted Goose | 77% | 5.9 |
| Killdeer | 65% | 30.8 |
| Common Yellowthroat | 2293% | 3.2 |
| Common Loon | 102% | 3.6 |
| Song Sparrow | 44% | 22.3 |
| American Goldfinch | 47% | 27.1 |
| Northern Cardinal | 47% | 40.7 |
| White-breasted Nuthatch | 48% | 23.8 |
| Sedge Wren | 190% | 4.6 |
| Eastern Bluebird | 33% | 29.4 |
| Gadwall | 21% | 15.9 |
Decreasing
| Species | Decrease from Last Week | % of Checklists Reporting |
|---|---|---|
| California Gull | -99% | 0 |
| Surf Scoter | -91% | 0.2 |
| Nashville Warbler | -72% | 0.8 |
| House Wren | -78% | 0.5 |
| Barn Swallow | -65% | 1.5 |
| Common Merganser | -80% | 0.3 |
| Turkey Vulture | -47% | 10.1 |
| Eastern Phoebe | -48% | 3.7 |
| Herring Gull | -52% | 2.9 |
| Peregrine Falcon | -94% | 0 |
| Scissor-tailed Flycatcher | -49% | 2.1 |
| Tundra Swan | -65% | 1 |
| Indigo Bunting | -67% | 0.5 |
| Horned Grebe | -57% | 2.3 |
| Canvasback | -56% | 1.4 |
| Snowy Egret | -59% | 0.9 |
| Orange-crowned Warbler | -37% | 6.5 |
| American Pipit | -52% | 2.2 |
| Merlin | -51% | 1 |
| Osprey | -38% | 3.5 |
| Swainson's Hawk | -75% | 0.2 |
| Franklin's Gull | -24% | 17.7 |
| Ring-billed Gull | -24% | 21.3 |
| Gray Catbird | -95% | 0 |
| Great Egret | -28% | 7.5 |
West
Several days of scattered precipitation and generally unfavorable migration conditions yielded only highly isolated light to moderate flights across the region. By Monday night, more pockets of movements were apparent, increasing to moderate intensities in the Central Valley and Desert Southwest on Tuesday and Wednesday nights. But to end the period, light to moderate flights were primarily restricted to the coastal mountain ranges and locally to the Desert Southwest.
Top Movers
Increasing
| Species | Increase from Last Week | % of Checklists Reporting |
|---|---|---|
| White-winged Dove | 749% | 4.8 |
| Sandhill Crane | 184% | 4.8 |
| Pinyon Jay | 674% | 1.2 |
| Ferruginous Hawk | 287% | 2 |
| Bufflehead | 51% | 5.3 |
| White-throated Sparrow | 77% | 2 |
| Dark-eyed Junco | 34% | 29.5 |
| Mountain Chickadee | 62% | 6.2 |
| Snow Goose | 46% | 1.6 |
| Red-throated Loon | 27% | 1.5 |
| Canvasback | 32% | 2 |
| Lesser Scaup | 25% | 3.8 |
| Black-legged Kittiwake | 86% | 0.2 |
| Eurasian Wigeon | 32% | 0.9 |
| Bonaparte's Gull | 25% | 1.6 |
| Horned Grebe | 16% | 4.5 |
| Prairie Falcon | 19% | 1.7 |
| Cackling Goose | 15% | 4.5 |
Decreasing
| Species | Decrease from Last Week | % of Checklists Reporting |
|---|---|---|
| Brewer's Blackbird | -48% | 5.8 |
| Snowy Egret | -48% | 5 |
| Violet-green Swallow | -87% | 0.2 |
| Orange-crowned Warbler | -38% | 4.9 |
| Canada Goose | -38% | 13.4 |
| Peregrine Falcon | -44% | 2.3 |
| Great Egret | -37% | 9.7 |
| Turkey Vulture | -35% | 7.9 |
| California Gull | -36% | 8.1 |
| Northern Shoveler | -41% | 7.1 |
| Black-crowned Night-Heron | -45% | 2.5 |
| Pygmy Nuthatch | -42% | 2.2 |
| Golden Eagle | -47% | 0.9 |
| Mallard | -32% | 22.5 |
| Rock Wren | -38% | 1.8 |
| Wood Duck | -44% | 2.1 |
| Western Tanager | -72% | 0.2 |
| Barn Swallow | -51% | 1.4 |
| Long-tailed Duck | -84% | 0 |
| Merlin | -40% | 1.5 |
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Farnsworth and Van Doren
