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Sandhill Crane (Grus canadensis)
General Information
Sandhill Cranes are primarily birds of open fresh water wetlands,
but the different subspecies utilize habitats that range from bogs,
sedge meadows, and fens to open grasslands, pine savannas, and
cultivated lands. Sandhill Cranes occur at their highest breeding
density in habitats that contain open sedge meadows in wetlands that
are adjacent to short vegetation in uplands.
Mated pairs of cranes, including Sandhill Cranes, engage in unison
calling, which is a complex and extended series of coordinated
calls. While calling, cranes stand in an upright posture, usually
with their heads thrown back and beaks skyward during the display.
In Sandhill Cranes the female initiates the display and utters two,
higher-pitched calls for each male call. While calling, the female
raises her beak about 45 degrees above the horizontal while the male
raises his bill to a vertical position. All cranes engage in
dancing, which includes various behaviors such as bowing, jumping,
running, stick or grass tossing, as well as wing flapping. Though it
is commonly associated with courtship, dancing can occur at any age
and season. Dancing is generally believed to be a normal part of
motor development for cranes and thwarts aggression, relieves
tension, and strengthens the pair bond.
Nests of all Sandhill Cranes are usually low mounds built out of
dominant vegetation in the nesting area. Typically nests are located
in wetlands, but Sandhill Cranes will sometimes nest in uplands,
especially in Cuba. Females usually lay two eggs and incubation (by
both sexes) lasts 29-32 days. The male takes the primary role in
defending the nest against possible danger. Chicks fledge (first
flight) at 67-75 days.
Habitat and Range
Sandhill Cranes are the most abundant of the world’s
cranes. They are widely (though intermittently) distributed
throughout North America, extending into Cuba and far northeastern
Siberia. The three migratory subspecies (Lesser, Greater and
Canadian) are distributed across a broad breeding range in the
northern U.S. and Canada as well as eastern Siberia, with wintering
grounds in the southern United States and northern Mexico. The three
non-migratory subspecies (Mississippi, Cuban, and Florida) have
restricted ranges in the southern United States and Cuba.
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