The young are yelling for their food. The adults still tend the young for a while after they are out of the nest. Be glad you have hawks they are efficent at keeping varmin, rabbits, chipmunks and squirrels in balance. The yelling will soon end when the young can fend for themselves.

I've also seen hawks around here that look like cooper's but don't sound like them. I tried the sharp shinned and that's not it either. Books and internet need to also start noting juvenile bird calls. I've heard many odd hawk calls and no recordings verrifying ID. Maybe I'm hearing Juvy cooper's hawks too?

Here's a birdcam that might help. It's on the other side of the country, but the development should be roughly the same. The Red-tailed hawk built a nest on a fire escape in downtown Portland Oregon! http://www.kgw.com/livecams/content.html?livecams_birdcams Here is a link that might be useful: RaptorCam

obviously this is a little late, but here is a section of the illinois wildlife code. imho, it includes damaging nests of native and specifically birds of prey. does your state have anything similar? am i wrong? "520 ILCS 5/2.2) (from Ch. 61, par. 2.2) Sec. 2.2. This Act shall apply only to the wild birds and parts of wild birds (their nests and eggs), and wild mammals and parts of wild mammals, which shall include their green hides, in the State of Illinois, or which may be brought into the State, that are hereby defined as follows: All birds, both game and non‑game (except the House Sparrow, Passer domesticus; European Starling, Sturnus vulgaris; and Rock Dove or Domestic Pigeon, Columba livia). GAME BIRDS‑Ruffed grouse, Bonasa umbellus; Sharp‑tailed grouse, Pediocetes phasianellus; Bobwhite quail, Colinus virginianus; Hungarian Partridge, Perdix perdix; Chukar Partridge, Alectoris graeca; Ring‑necked Pheasant, Phasianus colchicus; Greater Prairie Chicken, Tympanuchus cupido; Wild Turkey, Meleagris gallopavo. MIGRATORY GAME BIRDS‑Waterfowl including brant, wild ducks, geese and swans, Anatidae; rails, gallinules and coots, Rallidae; snipe, Gallinago gallinago; woodcock, Scolopax minor; pigeons, including doves and wild pigeons (except domestic pigeons), Columbidae; and crows, Corvidae. RESIDENT AND MIGRATORY NON‑GAME BIRDS‑Loons, Gaviidae; grebes, Podicipedidae; pelicans, Pelecanidae; cormorants, Phalacrocoracidae; herons, bitterns and egrets, Ardeidae; ibises and spoonbills, Threskiornithidae; storks, Ciconiidae; vultures, Carthartidae; kites, hawks and eagles, Accipitridae; ospreys, Pandionidae; falcons, including the Peregrine Falcon, Falconidae; cranes, Gruidae; rails and gallinules, Rallidae; all shorebirds of the families Charadriidae, Scolopacidae, Recurvirostridae and Phalaropodidae; jaegers, Stercorariidae; gulls and terns, Laridae; cuckoos, Cuculidae; owls, Tytonidae and Strigidae; whip‑poor‑wills and nighthawks, Caprimulgidae; swifts, Apodidae; hummingbirds, Trochilidae, Kingfishers, Alcedinidae; woodpeckers, Picidae; kingbirds and flycatchers, Tyrannidae; larks, Alaudidae; swallows and martins, Hirundinidae; crows, magpies and jays, Corvidae; chickadees and titmice, Paridae; nuthatches, Sittidae; creepers, Certhiidae; wrens, Troglodytidae; mockingbirds, catbirds and thrashers, Mimidae; robins, bluebirds and thrushes, Turdidae; gnatcatchers and kinglets, Sylviidae; pipits, Motacillidae; waxwings, Bombycillidae; shrikes, Laniidae; vireos, Vireonidae; warblers, Parulidae; European Tree Sparrow, Passer montanus; blackbirds, meadowlarks and orioles, Icteridae; tanagers, thraupidae; cardinals, grosbeaks, finches, towhees, dickcissels, sparrows, juncos, buntings and longspurs, Fringillidae. GAME MAMMALS‑Woodchuck, Marmota monax; Gray squirrel, Sciurus carolinensis; Fox squirrel, Sciurus niger; White‑tailed jackrabbit, Lepus townsendii; Eastern cottontail, Sylvilagus floridanus; Swamp rabbit, Sylvilagus aquaticus; White‑tailed deer, Odocoileus virginianus. FUR‑BEARING MAMMALS‑Muskrat, Ondatra zibethicus; Beaver, Castor canadensis; Raccoon, Procyon lotor; Opossum, Didelphis marsupialis; Least weasel, Mustela rixosa; Long‑tailed weasel, Mustela frenata; Mink, Mustela vison; River otter, Lutra canadensis; Striped skunk, Mephitis mephitis; Badger, Taxidea taxus; Red fox, Vulpes vulpes; Gray fox, Urocyon cineraoargenteus; Coyote, Canis latrans; Bobcat, Lynx rufus. OTHER MAMMALS‑Flying squirrel, Glaucomys volans; Red squirrel, Tamiasciurus hudsonicus; Eastern Woodrat, Neotoma floridana; Golden Mouse, Ochrotomys nuttalli; Rice Rat, Oryzomys palustris; Bats, Vespertilionidae. It shall be unlawful for any person at any time to take, possess, sell, or offer for sale, any of these wild birds (dead or alive) and parts of wild birds (including their nests and eggs), wild mammals (dead or alive) and parts of wild mammals, including their green hides contrary to the provisions of this Act. However, nothing in this Act shall prohibit bona‑fide public or state scientific, educational or zoological institutions from receiving, holding and displaying "