Delaware · Summer breeder

Prothonotary Warblers in Delaware

When prothonotary warblers are present in Delaware, when they nest, which native Delaware plants feed them, and how to host them in a USDA 7a–8a yard.

Wood-warblers (Parulidae)Prothonotary WarblerProtonotaria citrea

Status in Delaware: Summer breeder
Nesting window: April–June
Broods: 1–2 per season
Hardiness zones: USDA 7a–8a
Nest box: 1 1/8 in hole, 4 × 4 in floor, 3–6 ft over water

When to expect prothonotary warblers in Delaware

Prothonotary Warblers are summer residents in Delaware, arriving shortly before nesting begins in April and leaving after the young are independent.

Humid subtropical to temperate coastal plain between Delaware Bay and the Atlantic.

Nesting in Delaware

Across Delaware, prothonotary warblers typically nest from April–June. Plan around that window: March for setup, June for clean-out.

Hot, humid summers; bay-shore woodlots are important migrant stopovers in May.

Have boxes cleaned and mounted before March — prothonotary warblers begin prospecting ahead of egg-laying.
Use a 1 1/8 in entrance on a 4 × 4 in floor, mounted 3–6 ft over water.
Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
Clean out old nests after each brood and again after June.

Native Delaware plants that attract prothonotary warblers

Of the regional native plants we track for Delaware, these 8 provide food or cover prothonotary warblers use:

Flowering dogwood

Cornus florida · Tree

Fat-rich red fall fruit taken by thrushes, bluebirds and woodpeckers.

Serviceberry

Amelanchier arborea · Tree

Early-summer berries arrive exactly when nestlings are being fed.

White oak

Quercus alba · Tree

Acorns plus hundreds of caterpillar species for nestling food.

Black cherry

Prunus serotina · Tree

Summer fruit and one of the top caterpillar host trees.

American elderberry

Sambucus canadensis · Shrub

Late-summer berry clusters taken by over 40 bird species.

Arrowwood viburnum

Viburnum dentatum · Shrub

Blue-black fall fruit and dense nesting cover.

Spicebush

Lindera benzoin · Shrub

Lipid-rich red fruit fuels fall migrants.

New England aster

Symphyotrichum novae-angliae · Perennial

Late nectar for insects and fall seed for sparrows.

Feeding prothonotary warblers through the Delaware year

Top foods: None — a swamp nest box is the draw.
In Delaware's summer: offer water and insect foods; natural food is abundant.

Full diet breakdown for prothonotary warblers · Best feeder for prothonotary warblers

Frequently asked

Are prothonotary warblers in Delaware year-round?

No. Prothonotary Warblers are summer breeders in Delaware and leave for the winter.

When do prothonotary warblers nest in Delaware?

Nesting in Delaware typically runs April–June, with 1–2 per season. Clutches are 3–7 eggs, incubated for 12–14 days.

What native plants attract prothonotary warblers in Delaware?

Flowering dogwood, Serviceberry, White oak, Black cherry, American elderberry, Arrowwood viburnum, Spicebush, New England aster are native plants in Delaware that provide food or cover for prothonotary warblers.

What size birdhouse hole do prothonotary warblers need?

1 1/8 in, with a floor of 4 × 4 in mounted 3–6 ft over water.

Prothonotary Warblers in other regions

Other backyard birds in Delaware

Northern Cardinal Eastern Bluebird Carolina Chickadee Purple Martin Downy Woodpecker Hairy Woodpecker American Goldfinch Tufted Titmouse White-breasted Nuthatch House Wren House Finch Purple Finch Ruby-throated Hummingbird Carolina Wren Mourning Dove American Robin Dark-eyed Junco White-throated Sparrow Song Sparrow Chipping Sparrow Red-bellied Woodpecker Northern Flicker Pileated Woodpecker Red-headed Woodpecker Yellow-bellied Sapsucker Red-breasted Nuthatch Brown-headed Nuthatch Brown Creeper Common Grackle Red-winged Blackbird Baltimore Oriole Orchard Oriole Pine Siskin Indigo Bunting Eastern Towhee Gray Catbird Northern Mockingbird Brown Thrasher Cedar Waxwing Tree Swallow Barn Swallow Eastern Phoebe Chimney Swift Yellow-rumped Warbler Pine Warbler Eastern Screech-Owl Wood Thrush Great Crested Flycatcher Eastern Kingbird American Tree Sparrow House Sparrow European Starling White-crowned Sparrow Fox Sparrow American Crow Cooper's Hawk Sharp-shinned Hawk Red-tailed Hawk Barred Owl Great Horned Owl American Kestrel Wood Duck Wild Turkey Northern Bobwhite Mallard Great Blue Heron Belted Kingfisher Scarlet Tanager Eastern Meadowlark Brown-headed Cowbird Ruby-crowned Kinglet Golden-crowned Kinglet Hermit Thrush Winter Wren Red Crossbill Field Sparrow Gray Catbird Lark Sparrow Hooded Merganser Yellow Warbler Common Yellowthroat American Redstart Black-and-white Warbler Yellow-throated Warbler Ovenbird Yellow-breasted Chat Red-eyed Vireo Warbling Vireo White-eyed Vireo Eastern Wood-Pewee Cliff Swallow Northern Rough-winged Swallow Bank Swallow Common Nighthawk Eastern Whip-poor-will Canada Goose American Coot Killdeer Spotted Sandpiper American Woodcock Green Heron Great Egret Black-crowned Night Heron Turkey Vulture Black Vulture Osprey Bald Eagle Red-shouldered Hawk Merlin Peregrine Falcon Northern Saw-whet Owl Barn Owl Savannah Sparrow Swamp Sparrow Vesper Sparrow Horned Lark Blue Grosbeak White-winged Crossbill Brown-headed Nuthatch Yellow-billed Cuckoo Rusty Blackbird Rock Pigeon

Sources

Timing reflects typical patterns for the region as a whole; local dates vary with elevation and year. Check the linked eBird bar charts for your county.