Hillside National Wildlife Refuge is an oasis of wildlife habitat surrounded by agriculture. Bounded on the east side by the unique loess

Loess

Loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometre size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate...

 bluffs of eastern Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

, this 15572 acres (63 km²) refuge was named to reflect its location at the base of the bluffs. The refuge was established in 1975 and provides important stop-over and nesting habitat for over 200 species of neotropical migratory birds. The refuge is also known for large numbers of wintering waterfowl

Waterfowl

Waterfowl are certain wildfowl of the order Anseriformes, especially members of the family Anatidae, which includes ducks, geese, and swans....

, at times exceeding 125,000 birds. Mallard

Mallard

The Mallard , or Wild Duck , is a dabbling duck which breeds throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, and has been introduced to New Zealand and Australia....

s, American wigeon

American Wigeon

The American Wigeon, also American Widgeon or Baldpate, is a species of wigeon in the dabbling duck genus Anas. If this is split up, all wigeons will go into their old genus Mareca again...

, gadwall

Gadwall

The Gadwall is a common and widespread duck of the family Anatidae.- Description :The Gadwall is 46–56 cm long with a 78–90 cm wingspan. The male is slightly larger than the female, weighing on average 990 g against her 850 g...

, northern shoveler

Northern Shoveler

The Northern Shoveler , Northern Shoveller in British English, sometimes known simply as the Shoveler, is a common and widespread duck. It breeds in northern areas of Europe and Asia and across most of North America, and is a rare vagrant to Australia...

, teal, scaup

Scaup

Scaup may refer to:* Scottish Conservative and Unionist Party, a political party in Scotland* One of three species of diving duck:** Greater Scaup or just Scaup, Aythya marila** Lesser Scaup, Aythya affinis...

, and ring-necked duck

Ring-necked Duck

The Ring-necked Duck is a smaller diving duck from North America.The adult male is similar in color pattern to the Eurasian Tufted Duck, its relative. It has a grey bill with a white band, a shiny purple head, a white breast, yellow eyes and a dark grey back...

s traveling through the Mississippi Flyway stop by Hillside National Wildlife Refuge each winter. Breeding populations of wood duck

Wood Duck

The Wood Duck or Carolina Duck is a species of duck found in North America. It is one of the most colourful of North American waterfowl.-Description:...

s and hooded merganser

Hooded Merganser

The Hooded Merganser is a small duck and is the only member of the genus Lophodytes.Hooded Mergansers have a crest at the back of the head which can be expanded or contracted. In adult males, this crest has a large white patch, the head is black and the sides of the duck are reddish-brown...

s can be found throughout the refuge. Common shorebirds include killdeer

Killdeer

The Killdeer is a medium-sized plover.Adults have a brown back and wings, a white belly, and a white breast with two black bands. The rump is tawny orange. The face and cap are brown with a white forehead. They have an orange-red eyering...

, snipe

Snipe

A snipe is any of about 25 wading bird species in three genera in the family Scolopacidae. They are characterized by a very long, slender bill and crypsis plumage. The Gallinago snipes have a nearly worldwide distribution, the Lymnocryptes Jack Snipe is restricted to Asia and Europe and the...

, least

Least Sandpiper

The Least Sandpiper is the smallest shorebird.This species has greenish legs and a short thin dark bill. Breeding adults are brown with dark brown streaks on top and white underneath. They have a light line above the eye and a dark crown. In winter, Least Sandpipers are grey above...

 and pectoral sandpiper

Pectoral Sandpiper

The Pectoral Sandpiper, Calidris melanotos, is a small wader. It is sometimes separated with the "stint" sandpipers in Erolia. This may or may not represent a good monophyletic group, depending on the placement of the phylogenetically enigmatic Curlew Sandpiper , the type species of Erolia...

s, and greater

Greater Yellowlegs

The Greater Yellowlegs, Tringa melanoleuca, is a large North American shorebird, similar in appearance to the smaller Lesser Yellowlegs. Its closest relative, however, is the Greenshank, which together with the Spotted Redshank form a close-knit group...

 and lesser yellowlegs

Lesser Yellowlegs

The Lesser Yellowlegs is a medium-sized shorebird similar in appearance to the larger Greater Yellowlegs. It is not closely related to this bird, however, but instead to the much larger and quite dissimilar Willet; merely the fine, clear and dense pattern of the neck shown in breeding plumage...

.
A wading bird rookery

Rookery

A rookery is a colony of breeding animals, generally birds. A rook is a Northern European and Central Asian member of the crow family, which nest in prominent colonies at the tops of trees. The term is applied to the nesting place of birds, such as crows and rooks, the source of the term...

 provides nesting and roosting habitat for several species of marsh

Marsh

In geography, a marsh, or morass, is a type of wetland that is subject to frequent or continuous flood. Typically the water is shallow and features grasses, rushes, reeds, typhas, sedges, other herbaceous plants, and moss....

 and wading birds including white ibis

American White Ibis

The American White Ibis is a species of wading bird in the ibis family Threskiornithidae. It occurs from the mid-Atlantic and Gulf coast of the United States south through most of the New World tropics...

; great

Great Egret

The Great Egret , also known as the Great White Egret or Common Egret, White Heron, or Great White Heron, is a large, widely-distributed egret. Distributed across most of the tropical and warmer temperate regions of the world, in southern Europe it is rather localized...

, snowy

Snowy Egret

The Snowy Egret is a small white heron. It is the American counterpart to the very similar Old World Little Egret, which has established a foothold in the Bahamas....

, and cattle egret

Cattle Egret

The Cattle Egret is a cosmopolitan species of heron found in the tropics, subtropics and warm temperate zones. It is the only member of the monotypic genus Bubulcus, although some authorities regard its two subspecies as full species, the Western Cattle Egret and the Eastern Cattle Egret...

s; great blue

Great Blue Heron

The Great Blue Heron is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North and Central America as well as the West Indies and the Galápagos Islands. It is a rare vagrant to Europe, with records from Spain, the Azores and England...

, little blue

Little Blue Heron

The Little Blue Heron, Egretta caerulea, is a small heron. It breeds from the Gulf states of the USA through Central America and the Caribbean south to Peru and Uruguay. It is a resident breeder in most of its range, but some northern breeders migrate to the southeastern USA or beyond in winter...

, and green-backed heron

Green-backed Heron

"Green-backed Heron" is a collective term for certain herons. Small and compact among herons, these birds often feature green plumage – rare among the Ardeidae –, in particular on the back, wings and scapulars....

s; and yellow-crowned night heron

Yellow-crowned Night Heron

The Yellow-crowned Night Heron , also called the American Night Heron or squawk, is a fairly small heron, similar in appearance to the Black-crowned Night Heron...

s.

Raptors include the red-tailed hawk

Red-tailed Hawk

The Red-tailed Hawk is a bird of prey, one of three species colloquially known in the United States as the "chickenhawk," though it rarely preys on standard sized chickens. It breeds throughout most of North America, from western Alaska and northern Canada to as far south as Panama and the West...

, northern harrier, American kestrel

American Kestrel

The American Kestrel , sometimes colloquially known as the Sparrow Hawk, is a small falcon, and the only kestrel found in the Americas. It is the most common falcon in North America, and is found in a wide variety of habitats. At long, it is also the smallest falcon in North America...

, and Mississippi kite

Mississippi Kite

The Mississippi Kite is a small bird of prey in the family Accipitridae. It is 12 to 15 inches beak to tail and has a wingspan averaging 3 feet . Weight is from 214 to 388 grams . Adults are gray with darker gray on their tail feathers and outer wings and lighter gray on their heads...

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