We’ve created a new tool to update us as species advance through their arrivals in each region, using data from eBird. We assign each species to four possible categories: Not Yet Arrived, Arrival Beginning, Approaching Peak, or Peaking. Then, we look for transitions between categories to tell us how each species is progressing through these stages. Below we show the transitions that have taken place in the last few days, and we highlight certain species with interactive maps.
Upper Midwest and Northeast
Prothonotary Warbler. Joe Bailey/Macaulay Library. eBird S35998617.
| Species | Recent Change |
|---|---|
| Chipping Sparrow | Approaching Peak → Peaking (1 d ago) |
| Blue-headed Vireo | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Purple Martin | Arrival Beginning → Approaching Peak (2 d ago) |
| Tree Swallow | Approaching Peak → Peaking (2 d ago) |
| Cliff Swallow | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Sedge Wren | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Louisiana Waterthrush | Approaching Peak → Peaking (2 d ago) |
| Swamp Sparrow | Approaching Peak → Peaking (2 d ago) |
| Brown-headed Cowbird | Approaching Peak → Peaking (2 d ago) |
| Blue-winged Teal | Approaching Peak → Peaking (3 d ago) |
| Sora | Arrival Beginning → Approaching Peak (3 d ago) |
| White-eyed Vireo | Not Yet Arrived → Arrival Beginning (3 d ago) |
| Northern Rough-winged Swallow | Arrival Beginning → Approaching Peak (3 d ago) |
| House Wren | Not Yet Arrived → Arrival Beginning (3 d ago) |
| Yellow-throated Warbler | Approaching Peak → Peaking (3 d ago) |
| Savannah Sparrow | Arrival Beginning → Approaching Peak (3 d ago) |
| Broad-winged Hawk | Arrival Beginning → Approaching Peak (4 d ago) |
| Greater Yellowlegs | Arrival Beginning → Approaching Peak (4 d ago) |
| Field Sparrow | Approaching Peak → Peaking (4 d ago) |
| Belted Kingfisher | Approaching Peak → Peaking (5 d ago) |
| Red-headed Woodpecker | Not Yet Arrived → Arrival Beginning (5 d ago) |
| Blue-gray Gnatcatcher | Arrival Beginning → Approaching Peak (5 d ago) |
| Ruby-crowned Kinglet | Approaching Peak → Peaking (5 d ago) |
| Eastern Towhee | Arrival Beginning → Approaching Peak (5 d ago) |
| Purple Finch | Approaching Peak → Peaking (5 d ago) |
| Lesser Yellowlegs | Arrival Beginning → Approaching Peak (6 d ago) |
| Forster's Tern | Arrival Beginning → Approaching Peak (6 d ago) |
| Prothonotary Warbler | Not Yet Arrived → Arrival Beginning (6 d ago) |
| Yellow-bellied Sapsucker | Approaching Peak → Peaking (7 d ago) |
| Brown Thrasher | Arrival Beginning → Approaching Peak (7 d ago) |
| Pine Warbler | Approaching Peak → Peaking (7 d ago) |
Blue-headed Vireo. David Hall/Macaulay Library. eBird S3525.7228
Cliff Swallow. Nathaniel Sharp/Macaulay Library. eBird S35524436.
House Wren. Dan Vickers/Macaulay Library. eBird S35859866.
Gulf Coast and Southeast
Cerulean Warbler. Peggy Rudman/Macaulay Library. eBird S35772676.
| Species | Recent Change |
|---|---|
| Chuck-will's-widow | Approaching Peak → Peaking (1 d ago) |
| Great Crested Flycatcher | Arrival Beginning → Approaching Peak (1 d ago) |
| Fulvous Whistling-Duck | Arrival Beginning → Approaching Peak (2 d ago) |
| Dunlin | Approaching Peak → Peaking (2 d ago) |
| Lesser Yellowlegs | Arrival Beginning → Approaching Peak (2 d ago) |
| Common Yellowthroat | Arrival Beginning → Approaching Peak (2 d ago) |
| Blackpoll Warbler | Arrival Beginning → Approaching Peak (2 d ago) |
| Green Heron | Arrival Beginning → Approaching Peak (3 d ago) |
| Ruddy Turnstone | Arrival Beginning → Approaching Peak (3 d ago) |
| Gull-billed Tern | Approaching Peak → Peaking (3 d ago) |
| Yellow-billed Cuckoo | Not Yet Arrived → Arrival Beginning (3 d ago) |
| Gray Catbird | Arrival Beginning → Approaching Peak (3 d ago) |
| Broad-winged Hawk | Approaching Peak → Peaking (4 d ago) |
| White-eyed Vireo | Approaching Peak → Peaking (4 d ago) |
| Prothonotary Warbler | Approaching Peak → Peaking (4 d ago) |
| Yellow-breasted Chat | Not Yet Arrived → Arrival Beginning (4 d ago) |
| Lark Sparrow | Arrival Beginning → Approaching Peak (4 d ago) |
| Stilt Sandpiper | Arrival Beginning → Approaching Peak (5 d ago) |
| Brown-crested Flycatcher | Arrival Beginning → Approaching Peak (5 d ago) |
| Bell's Vireo | Arrival Beginning → Approaching Peak (5 d ago) |
| Wood Thrush | Not Yet Arrived → Arrival Beginning (5 d ago) |
| Worm-eating Warbler | Approaching Peak → Peaking (5 d ago) |
| Northern Waterthrush | Not Yet Arrived → Arrival Beginning (5 d ago) |
| Blue-winged Warbler | Arrival Beginning → Approaching Peak (5 d ago) |
| Black-and-white Warbler | Arrival Beginning → Approaching Peak (5 d ago) |
| American Redstart | Not Yet Arrived → Arrival Beginning (5 d ago) |
| Ruby-throated Hummingbird | Arrival Beginning → Approaching Peak (6 d ago) |
| Ovenbird | Not Yet Arrived → Arrival Beginning (6 d ago) |
| Louisiana Waterthrush | Approaching Peak → Peaking (6 d ago) |
| Cerulean Warbler | Not Yet Arrived → Arrival Beginning (6 d ago) |
| Blue Grosbeak | Not Yet Arrived → Arrival Beginning (6 d ago) |
| Cattle Egret | Arrival Beginning → Approaching Peak (7 d ago) |
| Spotted Sandpiper | Not Yet Arrived → Arrival Beginning (7 d ago) |
| Franklin's Gull | Arrival Beginning → Approaching Peak (7 d ago) |
Wood Thrush. Vickie Baily/Macaulay Library. eBird S36025053.
American Redstart. Sandi Templeton/Macaulay Library. eBird S35899550.
West
American Avocet. Curtis McCamy/Macaulay Library. eBird S35863971.
| Black-necked Stilt | Approaching Peak → Peaking (1 d ago) |
|---|---|
| Northern Rough-winged Swallow | Approaching Peak → Peaking (1 d ago) |
| Common Loon | Approaching Peak → Peaking (2 d ago) |
| Swainson's Hawk | Approaching Peak → Peaking (2 d ago) |
| American Avocet | Arrival Beginning → Approaching Peak (2 d ago) |
| Dunlin | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Western Sandpiper | Arrival Beginning → Approaching Peak (2 d ago) |
| House Wren | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Common Yellowthroat | Approaching Peak → Peaking (2 d ago) |
| Black-throated Gray Warbler | Arrival Beginning → Approaching Peak (2 d ago) |
| Yellow-breasted Chat | Not Yet Arrived → Arrival Beginning (2 d ago) |
| Savannah Sparrow | Approaching Peak → Peaking (2 d ago) |
| Semipalmated Plover | Not Yet Arrived → Arrival Beginning (3 d ago) |
| Caspian Tern | Arrival Beginning → Approaching Peak (3 d ago) |
| Wilson's Warbler | Not Yet Arrived → Arrival Beginning (3 d ago) |
| Vaux's Swift | Not Yet Arrived → Arrival Beginning (4 d ago) |
| Ash-throated Flycatcher | Arrival Beginning → Approaching Peak (4 d ago) |
| Bank Swallow | Not Yet Arrived → Arrival Beginning (4 d ago) |
| Yellow-headed Blackbird | Arrival Beginning → Approaching Peak (4 d ago) |
| Brown-headed Cowbird | Not Yet Arrived → Arrival Beginning (4 d ago) |
| Black-chinned Hummingbird | Arrival Beginning → Approaching Peak (5 d ago) |
| Hammond's Flycatcher | Not Yet Arrived → Arrival Beginning (6 d ago) |
| Chipping Sparrow | Not Yet Arrived → Arrival Beginning (6 d ago) |
| White-crowned Sparrow | Approaching Peak → Peaking (6 d ago) |
Hammond’s Flycatcher. Brandon Miller/Macaulay Library. eBird S35828878.
Swainson’s Hawk. Ed Harper/Macaulay Library. eBird S35683088.
