WI songbirds in late July/early August -- a 2nd brood, or only one?

If you're wondering whether the species you're looking at here in WI in late July or early August is in the process of raising a 2nd brood, or if the species typically has only 1 brood, here's a list of some common WI species and the number of broods they have. Keep in mind that many species will start a 2nd clutch of eggs and raise that brood if they lose the first clutch through predation or some accident. These numbers are different for many species whose range also covers southern states, where the same species that is single-brooded in the north, may have 2 in the south:

most Neotropical flycatcher species - 1 brood
E. Phoebe - 2 broods
most swallows - 1 brood, Barn Swallow - 2 broods
Blue Jay - 1 brood
Gray Jay - 1 brood
Am. Crow and Com. Raven - 1 brood
chickadees & titmice - 1 brood
nuthatches - 1 brood
House Wren - 2 or 3
Carolina Wren - 2
Marsh Wren & Sedge Wren - 2
kinglets and gnatcatcher - 1 (GCKI may have 2)
E. Bluebird, Wood Thrush, Hermit Thrush - 2
Am. Robin - 2, sometimes 3
catbird & thrasher - 2
Cedar Waxwing - most often 1
most vireos at our latitude - 1, some exceptions
most warblers - this is still poorly-known for some species, prob. 1 (Yellow-r. Warbler, Com. Yellowthroat & Ovenbird may have 2)
grosbeaks, bunting, cardinal - 2 (cardinal may have 3!)
Dickcissel -1
Scarlet Tanager -1
E. Towhee - 2
Grasshopper, Henslow's, Vesper, Savannah, Song, Field, Chipping, and Swamp Sparrows - 2
Lark Sparrow - 1
White-throated and Lincoln's Sparrows - usually 1
both Meadowlarks - 2
Red-winged, Yellow-headed Blackbirds - 2
Brewer's Blackbird - 1
Baltimore and Orchard Orioles - 1 
Am. Goldfinch - 2, sometimes 1