Common merganser

Grote zaagbek

Common merganser (Mergus merganser)

The Common merganser (Mergus merganser) is a large duck from the family of water birds that includes ducks, geese, and swans (Anatidae).

Species name

Dutch name:
Grote zaagbek
English name:
Common merganser
German name:
Gänsesäger
French name:
Harle bièvre
Scientific name:
Mergus merganser

Scientific classification

Order:
Anseriformes
Family:
Anatidae
Onderfamilie:
Merginae
Genus:
Mergus

Description

Description:

Male:
Have a greenish-black crested head and upper neck. The lower neck, breast, and underparts are creamy-white with a variable pink wash. They have black backs and upperwing coverts with white scapulars. The bill is red with a blackish culmen and nail. The legs and feet are deep red. 

Female:
Have a tufted red-brown head that is clearly defined from the lower neck by a clear whitish chin. The back and sides are silver-gray and the breast and belly are white. The bill is red with a blackish culmen and nail. The legs and feet are deep red.

Juvenile:
 

Standard Measurements

Body Length (cm):
The male (drake) of the Common merganser measures approximately 58-71 centimeters. The female measures approximately Mergus merganser centimeters.
Body Weight (grams):
The male will weight about 1680-2180 gram. The female will weight about 1680-2180 gram.
The weight is notoriously variable and can only be used as indication!
Subspecies:
  • Mergus merganser merganser – found throughout northern Europe and northern Asia.
  • Mergus merganser orientalis – found in the Central Asian mountains. Slightly larger than Mergus merganser merganser, with a slenderer bill.
  • Mergus merganser americanus – found in North America. Bill broader-based than in Mergus merganser merganser, and a black bar crossing the white inner wing (visible in flight) on males.
Note:

Common mergansers nest in tree cavities, nest boxes, cliff crevices, and on the ground generally near clear water. Use large nest boxes requiring an entrance hole of 15 cm (5.9 in) in diameter.

Breeding:
The female Common merganser usually lays from 9-12 white to yellowish eggs and incubates them for 32-35 days.

Artificial incubating:

The ideal relative humidity for incubating most waterfowl eggs is 55% (ground nesters) and 40% (cavity nesters). The temperature is usually 37.4°C. Set ventilation as recommended by the incubator manufacturer. Eggs must be turned, either automatically or by hand, a minimum of 4 times a day. As the duckling develops there is a loss of water from the egg and the air sac gets bigger. In normal development of an egg with a 32-35 days incubation, the air sac occupies about a third of it three days earlier. Cleanliness is vital and ideally eggs should be moved to a separate hatcher at this point, where the humidity should be increased to 65% and even higher once they have pipped internally.


Bird banding:
Recommended closed leg band ring size for the Common merganser is 13 mm.
The leg band ring can only be applied on a young large duck at around 12 days old.

It doesn't matter what leg that you band, but it's good to have a consistent system.
Suggested: Left leg = Female, Right leg = Male
Rearing food:
Lundi Micro 45
Lundi Micro 45
Lundi Micro 45
Lundi Micro 45

The best floatable special rearing feed from Lundi. This ideally balanced complete feed with 42% protein forms the perfect basis for the successful rearing of your ducks. The ducks grow well and have their perfect juvenile plumage after a short time.
Made exclusively from wholesome and selected raw materials, Lundi Micro 45 is also ideally suited for year-round feeding of waterfowl.

Maintenance food:
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit

Floatable special complete food for sea birds with the highest nutritional requirements. Each chunk contains the complete nutrient spectrum. The high protein content of 35% ensures a healthy and species-appropriate diet. Spiral algae give a more magnificent coloration of plumage and sea salt promotes the salt gland.

Lundi Ibis See-Ente special
Lundi Ibis See-Ente special
Lundi Ibis See-Ente special
Lundi Ibis See-Ente special

Floating special complete food for sea birds with the highest nutritional requirements thanks to a particularly high protein content of 45%.

Ideal for daily feeding in animals that eat a lot of protein in their natural habitat. A must for "fish eaters".

Regulation:
Europese soort
Regulation:

Het is niet verboden om deze vogels te houden die van nature in Nederland voorkomen, op voorwaarde dat deze vogels in gevangenschap zijn geboren; nakweek dus. Deze vogels zijn voorzien van een gesloten pootring. Het is wel verboden om deze vogels te houden die in het wild gevangen zijn. Alleen bepaalde instanties, zoals vogelasiels en vogelhospitalen, zijn bevoegd om jonge en gewonde wilde vogels te houden. Deze bescherming van vogels wordt vormgegeven door schadelijke handelingen te verbieden zoals:het doden, verwonden, vangen, bemachtigen en met het oog daarop opsporen van vogels (art. 9 Flora- en faunawet); het opzettelijk verontrusten van vogels (art. 10 Flora- en faunawet);het beschadigen, vernielen, uithalen, wegnemen en verstoren van nesten, holen of andere voortplantings- of vaste rust- of verblijfplaatsen van vogels (art. 11 Flora- en faunawet);en het zoeken, rapen, uit het nest nemen, beschadigen of vernielen van eieren van vogels (art. 12 Flora- en faunawet).

Photos of the Common merganser

Videos of the Common merganser