Herpetotheres cachinnans
SUBFAMILY
Polyborinae
TAXONOMY
Herpetotheres cachinnans Linnaeus, 1758, Surinam. Three subspecies
usually recognized.
OTHER COMMON NAMES
French: Macagua rieur; German: Lachfalke; Spanish: Halcуn
Reidor.
PHYSICAL CHARACTERISTICS
17.7–20.9 in (45–53 cm); male 1.2–1.5 lb (565–690 g), female
1.4–1.8 lb (625–800 g). A distinctively patterned, large-headed,
black-masked falconid unlike any other, with short wings and
long tail. Head and underparts cinnamon-buff to white, with a
wide black mask from eyes to hindneck. Upperparts blackbrown.
Stout legs and short toes. Juvenile has dark feathers
edged rufous or buff. Races vary in size and color.
DISTRIBUTION
Central and South America, from Mexico to Paraguay and
northern Argentina.
HABITAT
Tropical and subtropical forest, near openings, tracks, or edge,
and open forest. Mainly in lowlands.
BEHAVIOR
Has very large home range for its size, estimated at 6,200 acres
(2,500 ha) in continuous forest, less in more disturbed habitats.
Thought to be sedentary.
FEEDING ECOLOGY AND DIET
Feeds almost exclusively on snakes that are terrestrial and arboreal,
venomous and harmless. Occasionally takes birds and
bats and, in disturbed areas, reptiles, rodents, and fish. Hunts
from a perch where it sits in wait for long periods with head
slightly bowed.
REPRODUCTIVE BIOLOGY
Nests as solitary pair that duets (“laughs”) near nest at dawn
and dusk. Lays single dark brown egg in trees or cliff cavities,
stick nests of another species, or on epiphytes. Nestlings fledge
at about eight weeks and stay with parent for some months.
CONSERVATION STATUS
Not threatened. Uncommon or fairly common throughout
much of their extensive range.
SIGNIFICANCE TO HUMANS
Of traditional significance to local Indians.
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