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lasse scaup
 BIOLOGICAL DESCRIPTION OF THE LASSE SCAUP
TAXONOMY
KINGDOM: ANIMALIA
PHYLUM: CHORDATA
SUBPHYLUM: VERTEBRATA
CLASS: BIRDS
ORDER: ANSERIFORMES
FAMILY: ANATIDAE
GENUS: Aythya
SPECIES: affinis
IT MEASURES FROM 38 TO 46 cm.. IT PRESENTS A DARK PURPLE COLORATION IN THE HEAD, NECH AND CHEST. THE SUPERIOR PART OF THE BODY IS GRAY. THE PEAK IS LIGHT GRAY-BLUE. IT IS ALSO KNOWN AS THE BLUE PEAK DUCKS. FEMALES ARE DARK BROWN WITH SMALL WHITE SPOTS IN THE HEAD AND ARE HARDLY DISTINGUISHABLE BETWEEN THEM.
THEY BUILD THEIR NESTS IN THE DEEP PART OF THE GRASS AWAY FROM THE WATER AND LAY FROM 9 TO 12 EGGS. INCUBATION LASTS FROM 21 TO 28 DAYS. THEY REPRODUCE ONLY ONCE A YEAR.
THESE DUCKS ARE COMPLETELY FEATHERED AT THEIR 45 TO 50 DAYS OLD.
THEIR FEEDING IS BASED ON SEEDS AND PLANTS, THEY EAT SOME AQUATIC INVERTEBRATES.
THEY LIVE IN MOIST SOILS. DURING MIGRATION IT IS COMMON TO SEE THEM IN LAKES AND RIVERS. THEY REPRODUCE IN ALASKA AND CANADA TO COLORADO. IT IS COMMON TO SEE THEM IN THIS ZONE.
THESE DUCKS EMIGRATE FROM THE CANADIAN TUNDRA TO NORTHEAST MEXICO DURING THE MONTHS OF SEPTEMBER AND OCTOBER, RETURNING TO THEIR REPRODUCTION SITES IN THE MONTHS OF FEBRUARY AND MARCH. (GOUGH, 1998) (ADAIR, 1990).
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COMMON NAME: LASSE SCAUP
SCIENTIFIC NAME: Aythya affinis
TYPE OF GAIN: Cinegetic
TYPE OF MARKING: HUNTING LICENSE
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CHRONOLOGY OF THE LASSE SCAUP
MONTHS
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ACTIVITY
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J
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F
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M
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A
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M
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J
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J
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A
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S
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O
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N
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D
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COURTSHIP
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X
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X
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X
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X
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X
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SPRING MIGRATION
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X
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X
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NESTING
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X
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X
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X
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WINTER MIGRATION
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X
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X
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X
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X
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