Designed as a classic tycoon game, Ski Park Tycoon is a ski resort simulation PC game that will keep you entertained for quite some time. I am a skiing enthusiast myself and every time I went on my winter holiday I wondered what it would be like to design and run a ski resort of and on my own. 1992, Scott and Rose 1996, Snow and Perrins 1998) or only locally migratory. Heavy losses have also been recorded from local incidences of copper.

Justification Justification of Red List Category This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population justification The global population is estimated to number approximately c.598,000-615,000 individuals (Wetlands International 2015). The European population is estimated at 83,400-116,000 pairs, which equates to 167,000-231,000 mature individuals (BirdLife International 2015).

Trend justification The overall population trend is increasing, although some populations have unknown trends (Wetlands International 2015). The European population is estimated to be increasing (BirdLife International, EBCC 2015). Ecology Behaviour Truly wild populations of this species are migratory (particularly where displaced by cold weather) (del Hoyo et al.

1992, Snow and Perrins 1998) although European and feral populations are essentially sedentary (Johnsgard 1978, del Hoyo et al. 1992, Scott and Rose 1996, Snow and Perrins 1998) or only locally migratory or nomadic (Scott and Rose 1996, Snow and Perrins 1998). The species breeds during the local spring (del Hoyo et al. 1992, Kear 2005a)as isolated pairs in well-defended territories (del Hoyo et al. After breeding the adults may gather in large concentrations of thousands or more (Johnsgard 1978, Madge and Burn 1988) on selected waters (Madge and Burn 1988) (non-breeders in northern Europe migrating to such gatherings (Snow and Perrins 1998)) between July and August (Scott and Rose 1996) to undergo a flightless moulting period lasting for 6-8 weeks (Kear 2005a). Although not noticeably sociable in many areas during the winter (Johnsgard 1978) the species may flock in groups of several thousands on favoured waters (Johnsgard 1978, Madge and Burn 1988, Scott and Rose 1996).

Habitat The species inhabits a variety of lowland freshwater wetlands (del Hoyo et al. 1992) such as shallow lakes (Kear 2005a), ponds (Madge and Burn 1988), lagoons, marshes (del Hoyo et al. 1992), reedbeds (del Hoyo et al.

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1992, Snow and Perrins 1998) and slow-flowing rivers (Kear 2005a) (showing a preference for clean, weed-filled streams over larger, polluted rivers) (Johnsgard 1978). It is also common on artificial waterbodies such as reservoirs, gravel-pits, ornamental lakes (del Hoyo et al.

1992), ditches (Snow and Perrins 1998) and canals (Scott and Rose 1996), and will graze on grassland and agricultural land (e.g. Arable cereal fields) (Kear 2005a). Moulting congregations of adults and non-breeders (Snow and Perrins 1998) may also utilise brackish or saline habitats (Johnsgard 1978) including brackish marshes (Kear 2005a), estuaries and sheltered coastal sites (del Hoyo et al. Brackish lagoons (Kear 2005a) and bays (Madge and Burn 1988)). Diet Its diet consists predominantly of leaves and the vegetative parts of aquatic plants (Johnsgard 1978, del Hoyo et al. 1992) and grasses (del Hoyo et al. 1992) as well as algae (Johnsgard 1978) and grain (del Hoyo et al.

1992), occasionally also taking small amphibians (Johnsgard 1978, del Hoyo et al. 1992) (frogs, toads and tadpoles) (Snow and Perrins 1998) and aquatic invertebrates (e.g. Molluscs, insects and worms) (Johnsgard 1978, del Hoyo et al. Breeding site The nest is a large mound of aquatic vegetation (del Hoyo et al. 1992, Kear 2005a) placed close to or floating on shallow water (del Hoyo et al.