in the
Bernese Highlands, Switzerland The Alpine ibex is strictly
herbivorous. Its diet consists mostly of grass, which is preferred all year; during the summer, ibexes supplement their diet with herbs, while during autumn and winter they also eat dwarf shrubs and conifer shoots. The most-commonly eaten grass genera are
Agrostis,
Avena,
Calamagrostis,
Festuca,
Phleum,
Poa,
Sesleria, and
Trisetum. High temperatures cause
heat stress in large adult males, reducing their feeding time, but they may avoid this problem by feeding at night. In Gran Paradiso,
home ranges of the Alpine Ibex can exceed and in reintroduced populations, home ranges may approach . Ibexes do not
hibernate during the winter; they take shelter on cold winter nights and
bask in the mornings. They also reduce their heart rate and metabolism. The Alpine ibex may compete for resources with
chamois and
red deer; The Alpine ibex's climbing ability is such that it has been observed scaling the 57-degree slopes of the
Cingino Dam in
Piedmont, Italy, where it
licks salts. Only females and kids, which are lighter and have shorter legs than adult males, climb the steep dam. Kids have been observed at ascending in a zig-zag path and descending in straight paths.
Social behaviour The Alpine ibex is a
social species but it tends to live in groups that are based on sex and age. Female groups consist of 5–10 members and male groups usually have 2–16 members but sometimes have more than 50. Adult males, particularly older males, are more likely to be found alone than females. Social spacing tends to be looser in the summer, when there is more room to feed. Ibexes have stable social connections; they consistently regroup with the same individuals when ecological conditions force them together. Female groups tend to be more stable than male groups. Hierarchies are established outside the breeding season, allowing males to focus more on mating and less on fighting. Males use their horns for combat; they bash rivals' sides or clash head-to-head often by rearing then clashing downwards. Alpine ibexes communicate mainly through short, sharp whistles that serve mostly as alarm calls and may occur singularly or in succession with short gaps. Females and their young communicate by bleating. After
copulation, the male rejoins his group and restarts the first phase of the rut. The female is in oestrus for around 20 days and gestation averages around five months, and typically results in the birth of one or sometimes two kids. Females give birth away from their social groups on rocky slopes that are relatively safe from predators. After a few days, the kids can move on their own. Mothers and kids gather into
nursery groups, where young are nursed for up to five months. In males, the horns grow at about per year for the first five-and-a-half years, slowing to half that rate once the animal reaches 10 years of age. The age of an ibex can be determined by annual growth rings in the horns, which stop growing in winter. In one study, all kids reached two years of age and the majority of adults lived for 13 years, although most 13-year-old males did not reach the age of 15. Alpine ibexes have a low rate of predation; and
foot rot caused by
Dichelobacter nodosus. Infections from
Mycoplasma conjunctivae damage the eye via
keratoconjunctivitis and can lead to death rates of up to 30%. Ibexes can host gastrointestinal parasites such as
coccidia,
strongyles,
Teladorsagia circumcincta, and
Marshallagi amarshalli as well as
lungworms, mainly
Muellerius capillaris. Several individuals have died from heart diseases, including
arteriosclerosis,
cardiac fibrosis,
sarcosporidiosis, and
valvular heart disease. ==Conservation==