This weekend will feature some intense migration in the central US, the first of several intense pulses as we approach the peak period of migration intensity for the spring. Particularly striking is the forecast for Sunday evening, 29-30 April 2018, when a corridor of medium to high migration traffic is predicted aloft from Mexico to Canada.
Looking more closely at weather conditions that may be responsible for this pattern, we see a strong high pressure center (H) is forecast to be south of the Great Lakes on Sunday morning. We also see little to no forecast precipitation (only a splotch of green). To the west of the H, notice the patterns of isobars (lines of constant pressure that are useful for representing wind speed) that highlight favorable southerly flow (winds blowing generally from south to north). This pattern of wind speeds and directions is quite common in the spring in this region (you may have heard about a phenomenon called low-level jets), making for favorable travel conditions for the enormous numbers of migrants usually on the move over these areas.
We expect a good diversity of species on the move in the central US, including the following:
Beginning Arrivals What is this?
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Brown Thrasher | ****! | 4/2 | 4/28 | 5/7 | 6/9 | 6/29 |
| Grasshopper Sparrow | *** | 4/5 | 5/27 | After Jun 30 | - | - |
| Lincoln's Sparrow | *** | 4/6 | 4/28 | 5/4 | 5/14 | 5/21 |
| Cassin's Sparrow | * | 4/7 | 5/1 | 6/13 | After Jun 30 | - |
| Marbled Godwit | * | 4/9 | 6/5 | 6/13 | 6/21 | After Jun 30 |
| Yellow-rumped Warbler | ****! | 4/11 | 4/28 | 5/4 | 5/15 | 5/23 |
| Black-crowned Night-Heron | * | 4/12 | 6/4 | 6/13 | After Jun 30 | - |
| House Wren | ****! | 4/16 | 4/28 | 5/12 | 5/21 | 6/9 |
| Spotted Sandpiper | ****! | 4/18 | 4/28 | 5/12 | 5/24 | 6/1 |
| Ruby-throated Hummingbird | *** | 4/18 | 5/1 | 5/16 | 5/23 | 6/12 |
| Eastern Kingbird | ****! | 4/18 | 4/30 | 5/24 | 6/24 | 6/26 |
| White-crowned Sparrow | ****! | 4/19 | 4/28 | 5/4 | 5/14 | 5/21 |
| Warbling Vireo | ****! | 4/20 | 4/29 | 5/15 | 5/23 | After Jun 30 |
| Orange-crowned Warbler | ****! | 4/21 | 4/28 | 5/5 | 5/15 | 5/22 |
| Kentucky Warbler | *** | 4/21 | 5/2 | 5/12 | 5/29 | 6/5 |
| Summer Tanager | ****! | 4/21 | 5/1 | 5/10 | 5/18 | After Jun 30 |
| Great Crested Flycatcher | ****! | 4/23 | 4/30 | 5/12 | 6/26 | After Jun 30 |
| Painted Bunting | *** | 4/23 | 5/1 | 6/3 | 6/29 | After Jun 30 |
| Dickcissel | ****! | 4/23 | 5/1 | After Jun 30 | - | - |
| Baltimore Oriole | ****! | 4/23 | 4/30 | 5/12 | 5/23 | 6/27 |
| Mississippi Kite | *** | 4/24 | 5/3 | 5/16 | 6/12 | 6/15 |
| Palm Warbler | *** | 4/24 | 4/29 | 5/5 | 5/24 | 5/26 |
| Clay-colored Sparrow | ****! | 4/24 | 5/1 | 5/9 | 5/18 | 5/24 |
| Yellow-throated Vireo | *** | 4/25 | 5/1 | 5/11 | 5/27 | After Jun 30 |
| Red-eyed Vireo | ****! | 4/25 | 5/2 | 5/27 | 6/4 | After Jun 30 |
| Common Yellowthroat | ****! | 4/25 | 5/3 | 5/18 | 6/24 | 6/29 |
| Scarlet Tanager | *** | 4/25 | 5/4 | 5/20 | 6/6 | 6/11 |
| Bell's Vireo | *** | 4/26 | 5/6 | 6/3 | 6/9 | 6/28 |
| Blue-headed Vireo | *** | 4/26 | 4/30 | 5/9 | 5/19 | 5/23 |
| Wood Thrush | *** | 4/26 | 5/2 | 5/13 | 5/21 | 6/3 |
| Black-and-white Warbler | ****! | 4/26 | 5/3 | 5/9 | 5/13 | 6/5 |
| Nashville Warbler | ****! | 4/26 | 4/30 | 5/7 | 5/20 | 5/26 |
| Indigo Bunting | ****! | 4/26 | 5/2 | 5/10 | 6/5 | After Jun 30 |
| Red-headed Woodpecker | ****! | 4/28 | 5/5 | 5/15 | 6/4 | 6/8 |
| Sedge Wren | * | 4/28 | 6/11 | 6/14 | 6/20 | 6/23 |
| Swainson's Thrush | ****! | 4/28 | 5/5 | 5/12 | 5/23 | 5/30 |
| Northern Waterthrush | *** | 4/28 | 5/3 | 5/11 | 5/23 | 5/28 |
| Lark Bunting | *** | 4/28 | 5/9 | 5/31 | 6/24 | After Jun 30 |
| Black-headed Grosbeak | *** | 4/28 | 5/7 | 6/4 | After Jun 30 | - |
| Common Nighthawk | *** | 4/29 | 5/22 | 5/30 | 6/5 | After Jun 30 |
| Least Flycatcher | ****! | 4/29 | 5/5 | 5/13 | 5/24 | 5/28 |
| Gray Catbird | ****! | 4/29 | 5/5 | 5/17 | 5/24 | 5/29 |
| Tennessee Warbler | ****! | 4/29 | 5/3 | 5/17 | 5/24 | 5/29 |
| Yellow Warbler | ****! | 4/29 | 5/4 | 5/16 | 5/24 | 5/28 |
| Orchard Oriole | ****! | 4/29 | 5/6 | 6/2 | 6/8 | 6/10 |
| Philadelphia Vireo | *** | 4/30 | 5/6 | 5/16 | 5/24 | 6/1 |
| Yellow-breasted Chat | *** | 4/30 | 5/29 | 6/2 | 6/8 | 6/11 |
| Rose-breasted Grosbeak | ****! | 4/30 | 5/5 | 5/10 | 5/23 | 5/26 |
| Blue Grosbeak | *** | 4/30 | 5/30 | 6/5 | 6/10 | 6/13 |
| Bobolink | *** | 4/30 | 5/12 | 6/14 | 6/23 | After Jun 30 |
| Eastern Wood-Pewee | ****! | 5/1 | 5/8 | 5/17 | 6/25 | After Jun 30 |
| Acadian Flycatcher | *** | 5/1 | 5/5 | 5/24 | 5/28 | After Jun 30 |
| Yellow-billed Cuckoo | *** | 5/2 | 5/24 | 5/31 | After Jun 30 | - |
| Gray-cheeked Thrush | *** | 5/2 | 5/7 | 5/12 | 5/24 | 5/28 |
| Ovenbird | *** | 5/3 | 5/8 | 5/16 | 5/23 | 5/27 |
| American Redstart | ****! | 5/3 | 5/10 | 5/18 | 5/24 | 5/28 |
| Chestnut-sided Warbler | *** | 5/3 | 5/7 | 5/18 | 5/25 | 5/30 |
| Blackpoll Warbler | ****! | 5/3 | 5/7 | 5/14 | 5/25 | 5/29 |
| Wilson's Warbler | ****! | 5/3 | 5/7 | 5/13 | 5/24 | 5/28 |
| Willow Flycatcher | *** | 5/4 | 5/16 | 6/13 | 6/29 | After Jun 30 |
| Magnolia Warbler | *** | 5/4 | 5/8 | 5/18 | 5/24 | 5/29 |
Peaking Arrivals
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Eastern Phoebe | *** | 3/2 | 3/12 | 5/5 | 5/18 | After Jun 30 |
| Common Grackle | *** | 3/2 | 3/13 | 5/21 | 6/11 | After Jun 30 |
| Wood Duck | ** | 3/2 | 3/24 | 5/6 | 5/24 | 6/7 |
| Pectoral Sandpiper | ** | 3/25 | 3/28 | 5/16 | 5/24 | 5/30 |
| Turkey Vulture | *** | 3/14 | 3/30 | 5/9 | 5/18 | After Jun 30 |
| Field Sparrow | *** | 3/12 | 3/31 | 4/28 | 5/11 | 5/18 |
| Tree Swallow | *** | 3/24 | 4/1 | 5/1 | 6/25 | After Jun 30 |
| Ruby-crowned Kinglet | *** | 3/26 | 4/1 | 5/1 | 5/12 | 5/24 |
| Louisiana Waterthrush | ** | 3/25 | 4/2 | 5/5 | 5/17 | 5/22 |
| White-eyed Vireo | * | 3/19 | 4/4 | 5/23 | 6/12 | After Jun 30 |
| Purple Martin | *** | 3/20 | 4/4 | 5/7 | After Jun 30 | - |
| Blue-gray Gnatcatcher | *** | 3/26 | 4/5 | 5/6 | 5/17 | 5/22 |
| Northern Parula | *** | 4/1 | 4/8 | 5/7 | 5/18 | 5/24 |
| Little Blue Heron | ** | 3/29 | 4/10 | 4/29 | 5/8 | 5/18 |
| Say's Phoebe | * | 3/23 | 4/14 | 6/11 | 6/26 | After Jun 30 |
| Yellow-headed Blackbird | ** | 4/7 | 4/14 | 6/15 | 6/20 | 6/24 |
| Western Grebe | * | 4/1 | 4/16 | 6/12 | After Jun 30 | - |
| Cattle Egret | * | 3/30 | 4/16 | 6/22 | After Jun 30 | - |
| Sora | ** | 4/10 | 4/17 | 5/17 | 6/21 | After Jun 30 |
| Broad-winged Hawk | *** | 4/6 | 4/20 | 4/29 | 5/21 | 5/27 |
| Upland Sandpiper | *** | 4/3 | 4/20 | 5/6 | 5/11 | 5/18 |
| Forster's Tern | ** | 4/13 | 4/20 | 5/13 | 5/20 | After Jun 30 |
| Prothonotary Warbler | ** | 4/6 | 4/20 | 5/7 | 5/21 | 6/4 |
| Lark Sparrow | *** | 4/7 | 4/20 | 5/8 | 5/16 | After Jun 30 |
| Least Sandpiper | *** | 4/18 | 4/21 | 5/14 | 5/21 | 5/27 |
| Semipalmated Sandpiper | *** | 4/13 | 4/21 | 5/15 | 5/24 | 6/2 |
| Long-billed Dowitcher | *** | 4/17 | 4/21 | 5/1 | 5/20 | 5/27 |
| Wilson's Phalarope | ****! | 4/16 | 4/21 | 4/28 | 5/22 | After Jun 30 |
| Peregrine Falcon | ** | 4/12 | 4/21 | 5/4 | 5/16 | 5/27 |
| Northern Rough-winged Swallow | *** | 3/30 | 4/21 | 5/4 | 5/21 | 5/27 |
| Brown-headed Cowbird | *** | 3/14 | 4/21 | 5/11 | 5/19 | 6/10 |
| Willet | *** | 4/17 | 4/22 | 4/29 | 5/6 | After Jun 30 |
| Barn Swallow | ****! | 4/3 | 4/22 | 5/18 | 6/29 | After Jun 30 |
| Green Heron | *** | 4/12 | 4/23 | 5/14 | 6/5 | 6/11 |
| Cliff Swallow | *** | 4/11 | 4/23 | 6/16 | 6/24 | After Jun 30 |
| Harris's Sparrow | *** | 4/17 | 4/23 | 5/2 | 5/13 | 5/22 |
| Solitary Sandpiper | *** | 4/16 | 4/25 | 5/3 | 5/11 | 5/23 |
| White-throated Sparrow | *** | 4/18 | 4/25 | 5/1 | 5/11 | 5/23 |
| Chimney Swift | *** | 4/16 | 4/26 | 5/13 | 6/9 | 6/14 |
| Western Kingbird | *** | 4/20 | 4/26 | 6/6 | 6/26 | After Jun 30 |
| Chipping Sparrow | ****! | 3/31 | 4/26 | 5/6 | 5/18 | 5/27 |
| Eastern Towhee | ** | 3/23 | 4/26 | 5/9 | 5/22 | 5/31 |
| Bank Swallow | *** | 4/13 | 4/27 | 5/15 | 5/24 | After Jun 30 |
| Spotted Sandpiper | *** | 4/18 | 4/28 | 5/12 | 5/24 | 6/1 |
| House Wren | ****! | 4/16 | 4/28 | 5/12 | 5/21 | 6/9 |
| Brown Thrasher | ****! | 4/2 | 4/28 | 5/7 | 6/9 | 6/29 |
| Orange-crowned Warbler | ****! | 4/21 | 4/28 | 5/5 | 5/15 | 5/22 |
| Yellow-rumped Warbler | ****! | 4/11 | 4/28 | 5/4 | 5/15 | 5/23 |
| White-crowned Sparrow | ****! | 4/19 | 4/28 | 5/4 | 5/14 | 5/21 |
| Lincoln's Sparrow | *** | 4/6 | 4/28 | 5/4 | 5/14 | 5/21 |
| Warbling Vireo | ****! | 4/20 | 4/29 | 5/15 | 5/23 | After Jun 30 |
| Palm Warbler | *** | 4/24 | 4/29 | 5/5 | 5/24 | 5/26 |
| Great Crested Flycatcher | ****! | 4/23 | 4/30 | 5/12 | 6/26 | After Jun 30 |
| Eastern Kingbird | ****! | 4/18 | 4/30 | 5/24 | 6/24 | 6/26 |
| Blue-headed Vireo | *** | 4/26 | 4/30 | 5/9 | 5/19 | 5/23 |
| Nashville Warbler | ****! | 4/26 | 4/30 | 5/7 | 5/20 | 5/26 |
| Baltimore Oriole | ****! | 4/23 | 4/30 | 5/12 | 5/23 | 6/27 |
| Ruby-throated Hummingbird | *** | 4/18 | 5/1 | 5/16 | 5/23 | 6/12 |
| Yellow-throated Vireo | *** | 4/25 | 5/1 | 5/11 | 5/27 | After Jun 30 |
| Cassin's Sparrow | * | 4/7 | 5/1 | 6/13 | After Jun 30 | - |
| Clay-colored Sparrow | ****! | 4/24 | 5/1 | 5/9 | 5/18 | 5/24 |
| Summer Tanager | *** | 4/21 | 5/1 | 5/10 | 5/18 | After Jun 30 |
| Painted Bunting | ** | 4/23 | 5/1 | 6/3 | 6/29 | After Jun 30 |
| Dickcissel | *** | 4/23 | 5/1 | After Jun 30 | - | - |
| Red-eyed Vireo | *** | 4/25 | 5/2 | 5/27 | 6/4 | After Jun 30 |
| Wood Thrush | *** | 4/26 | 5/2 | 5/13 | 5/21 | 6/3 |
| Kentucky Warbler | *** | 4/21 | 5/2 | 5/12 | 5/29 | 6/5 |
| Indigo Bunting | ****! | 4/26 | 5/2 | 5/10 | 6/5 | After Jun 30 |
| Mississippi Kite | *** | 4/24 | 5/3 | 5/16 | 6/12 | 6/15 |
| Northern Waterthrush | *** | 4/28 | 5/3 | 5/11 | 5/23 | 5/28 |
| Black-and-white Warbler | *** | 4/26 | 5/3 | 5/9 | 5/13 | 6/5 |
| Tennessee Warbler | ****! | 4/29 | 5/3 | 5/17 | 5/24 | 5/29 |
| Common Yellowthroat | ****! | 4/25 | 5/3 | 5/18 | 6/24 | 6/29 |
| Yellow Warbler | ****! | 4/29 | 5/4 | 5/16 | 5/24 | 5/28 |
| Scarlet Tanager | ** | 4/25 | 5/4 | 5/20 | 6/6 | 6/11 |
| Red-headed Woodpecker | *** | 4/28 | 5/5 | 5/15 | 6/4 | 6/8 |
| Acadian Flycatcher | ** | 5/1 | 5/5 | 5/24 | 5/28 | After Jun 30 |
| Least Flycatcher | ****! | 4/29 | 5/5 | 5/13 | 5/24 | 5/28 |
| Swainson's Thrush | ****! | 4/28 | 5/5 | 5/12 | 5/23 | 5/30 |
| Gray Catbird | ****! | 4/29 | 5/5 | 5/17 | 5/24 | 5/29 |
| Rose-breasted Grosbeak | ****! | 4/30 | 5/5 | 5/10 | 5/23 | 5/26 |
Beginning Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Northern Pintail | ** | - | 3/2 | 3/12 | 6/25 | After Jun 30 |
| Gadwall | *** | 3/11 | 3/17 | 3/25 | After Jun 30 | - |
| Lesser Scaup | *** | 3/2 | 3/17 | 3/28 | 4/29 | After Jun 30 |
| Killdeer | ** | 3/2 | 3/7 | 3/31 | 5/2 | After Jun 30 |
| Sharp-shinned Hawk | ** | 3/23 | 3/29 | 4/5 | 4/28 | 5/13 |
| Ruddy Duck | *** | 3/2 | 3/16 | 4/6 | 5/5 | After Jun 30 |
| Common Loon | * | 3/16 | 3/24 | 4/6 | 5/8 | 5/14 |
| Belted Kingfisher | ** | 3/2 | 3/23 | 4/9 | 5/20 | 6/4 |
| Northern Shoveler | *** | 3/10 | 3/16 | 4/14 | 5/1 | After Jun 30 |
| Double-crested Cormorant | *** | 3/12 | 3/28 | 4/14 | 4/29 | After Jun 30 |
| Horned Grebe | ** | 3/9 | 3/17 | 4/16 | 5/6 | 5/18 |
| Wilson's Snipe | * | 3/2 | 4/8 | 4/17 | 6/20 | After Jun 30 |
| Pied-billed Grebe | *** | 3/16 | 4/8 | 4/18 | 4/30 | 5/11 |
| Bonaparte's Gull | *** | 3/29 | 4/6 | 4/18 | 5/1 | 5/13 |
| American Pipit | ** | 3/2 | 3/14 | 4/19 | 5/7 | 5/18 |
| Greater Yellowlegs | *** | 3/12 | 3/22 | 4/20 | 4/30 | 5/9 |
| American White Pelican | *** | 3/13 | 3/16 | 4/21 | 4/29 | 6/27 |
| American Coot | *** | 3/14 | 4/9 | 4/21 | 4/30 | 5/26 |
| Hermit Thrush | ** | 3/23 | 4/2 | 4/22 | 5/10 | 5/18 |
| Vesper Sparrow | *** | 3/24 | 3/31 | 4/22 | 5/1 | 5/9 |
| Blue-winged Teal | *** | 3/11 | 3/19 | 4/23 | 5/23 | 6/25 |
| Osprey | *** | 4/6 | 4/13 | 4/23 | 5/5 | 5/9 |
| Swainson's Hawk | *** | 3/31 | 4/9 | 4/23 | 5/2 | After Jun 30 |
| Hudsonian Godwit | *** | 4/11 | 4/17 | 4/23 | 4/29 | 5/26 |
| Franklin's Gull | *** | 4/2 | 4/13 | 4/23 | 5/1 | 5/24 |
| Yellow-throated Warbler | * | 3/17 | 4/2 | 4/23 | 5/20 | 6/5 |
| Great Blue Heron | *** | 3/2 | 3/22 | 4/24 | 5/19 | After Jun 30 |
| Great Egret | *** | 3/24 | 4/8 | 4/24 | 5/8 | After Jun 30 |
| Baird's Sandpiper | *** | 3/14 | 3/27 | 4/24 | 5/24 | 6/2 |
| Savannah Sparrow | *** | 3/16 | 4/17 | 4/24 | 5/7 | 6/23 |
| American Avocet | ** | 4/9 | 4/17 | 4/25 | 6/23 | After Jun 30 |
| Semipalmated Plover | ** | 4/13 | 4/20 | 4/25 | 5/24 | 6/1 |
| Scissor-tailed Flycatcher | * | 3/28 | 4/7 | 4/25 | 6/12 | After Jun 30 |
| Eared Grebe | ** | 4/7 | 4/17 | 4/26 | 6/21 | After Jun 30 |
| White-faced Ibis | ** | 4/9 | 4/18 | 4/26 | 5/23 | After Jun 30 |
| Black-necked Stilt | * | 4/9 | 4/17 | 4/26 | 5/2 | After Jun 30 |
| Lesser Yellowlegs | *** | 3/29 | 4/21 | 4/26 | 5/22 | 5/29 |
| Snowy Egret | * | 4/1 | 4/12 | 4/27 | 6/29 | After Jun 30 |
| Wilson's Phalarope | *** | 4/16 | 4/21 | 4/28 | 5/22 | After Jun 30 |
| Field Sparrow | ** | 3/12 | 3/31 | 4/28 | 5/11 | 5/18 |
| Little Blue Heron | * | 3/29 | 4/10 | 4/29 | 5/8 | 5/18 |
| Broad-winged Hawk | ** | 4/6 | 4/20 | 4/29 | 5/21 | 5/27 |
| Willet | *** | 4/17 | 4/22 | 4/29 | 5/6 | After Jun 30 |
| Long-billed Dowitcher | *** | 4/17 | 4/21 | 5/1 | 5/20 | 5/27 |
| Tree Swallow | *** | 3/24 | 4/1 | 5/1 | 6/25 | After Jun 30 |
| Ruby-crowned Kinglet | *** | 3/26 | 4/1 | 5/1 | 5/12 | 5/24 |
| White-throated Sparrow | *** | 4/18 | 4/25 | 5/1 | 5/11 | 5/23 |
| Harris's Sparrow | *** | 4/17 | 4/23 | 5/2 | 5/13 | 5/22 |
| Solitary Sandpiper | *** | 4/16 | 4/25 | 5/3 | 5/11 | 5/23 |
| Peregrine Falcon | ** | 4/12 | 4/21 | 5/4 | 5/16 | 5/27 |
| Northern Rough-winged Swallow | *** | 3/30 | 4/21 | 5/4 | 5/21 | 5/27 |
| Yellow-rumped Warbler | *** | 4/11 | 4/28 | 5/4 | 5/15 | 5/23 |
| White-crowned Sparrow | *** | 4/19 | 4/28 | 5/4 | 5/14 | 5/21 |
| Lincoln's Sparrow | *** | 4/6 | 4/28 | 5/4 | 5/14 | 5/21 |
| Eastern Phoebe | *** | 3/2 | 3/12 | 5/5 | 5/18 | After Jun 30 |
| Louisiana Waterthrush | *** | 3/25 | 4/2 | 5/5 | 5/17 | 5/22 |
| Orange-crowned Warbler | *** | 4/21 | 4/28 | 5/5 | 5/15 | 5/22 |
| Palm Warbler | *** | 4/24 | 4/29 | 5/5 | 5/24 | 5/26 |
Ending Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Redhead | ** | - | 3/2 | 3/14 | 3/29 | After Jun 30 |
| Ring-necked Duck | *** | - | 3/2 | 3/19 | 4/2 | 5/7 |
| Herring Gull | ** | - | - | Before Mar 1 | 4/2 | 4/30 |
| Bufflehead | *** | 3/2 | 3/14 | 3/23 | 4/6 | 5/8 |
| Ring-billed Gull | *** | 3/2 | 3/10 | 3/18 | 4/8 | After Jun 30 |
| Song Sparrow | ** | 3/12 | 3/17 | 3/31 | 4/11 | After Jun 30 |
| Northern Harrier | ** | 3/2 | 3/7 | 3/17 | 4/26 | After Jun 30 |
| American Kestrel | *** | - | 3/2 | 3/30 | 4/26 | 5/5 |
| American Wigeon | ** | - | 3/2 | 3/24 | 4/27 | After Jun 30 |
| Green-winged Teal | *** | 3/2 | 3/13 | 3/27 | 4/27 | 5/8 |
| Sharp-shinned Hawk | ** | 3/23 | 3/29 | 4/5 | 4/28 | 5/13 |
| Lesser Scaup | *** | 3/2 | 3/17 | 3/28 | 4/29 | After Jun 30 |
| Double-crested Cormorant | *** | 3/12 | 3/28 | 4/14 | 4/29 | After Jun 30 |
| American White Pelican | * | 3/13 | 3/16 | 4/21 | 4/29 | 6/27 |
| Hudsonian Godwit | ** | 4/11 | 4/17 | 4/23 | 4/29 | 5/26 |
| Pied-billed Grebe | *** | 3/16 | 4/8 | 4/18 | 4/30 | 5/11 |
| American Coot | *** | 3/14 | 4/9 | 4/21 | 4/30 | 5/26 |
| Greater Yellowlegs | *** | 3/12 | 3/22 | 4/20 | 4/30 | 5/9 |
| Northern Shoveler | *** | 3/10 | 3/16 | 4/14 | 5/1 | After Jun 30 |
| Bonaparte's Gull | *** | 3/29 | 4/6 | 4/18 | 5/1 | 5/13 |
| Franklin's Gull | *** | 4/2 | 4/13 | 4/23 | 5/1 | 5/24 |
| Vesper Sparrow | *** | 3/24 | 3/31 | 4/22 | 5/1 | 5/9 |
| Swainson's Hawk | * | 3/31 | 4/9 | 4/23 | 5/2 | After Jun 30 |
| Black-necked Stilt | * | 4/9 | 4/17 | 4/26 | 5/2 | After Jun 30 |
| Killdeer | * | 3/2 | 3/7 | 3/31 | 5/2 | After Jun 30 |
| Ruddy Duck | ** | 3/2 | 3/16 | 4/6 | 5/5 | After Jun 30 |
| Osprey | *** | 4/6 | 4/13 | 4/23 | 5/5 | 5/9 |
