Luke
29-07-06, 10:31 AM
http://i89.photobucket.com/albums/k205/griffo79/feralfiles-foxbanner.jpg
(Vulpes vulpes).
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-fox.jpg
The most common of the world’s many fox species is the European red fox (Vulpes vulpes). The fox is found on every continent except Antarctica.
Foxes have pointed muzzles, flattened slender skulls, large ears and long bushy tails. Adult foxes weigh 4.5 – 8 kgs.
Under the Rural Lands Protection Act, the fox is a declared animal and cannot be kept in captivity or introduced to Queensland. It is the responsibility of the landholders to control foxes on their own land.
Distribution
The European red fox was deliberately introduced into Australia in 1845. First released near Melbourne for sporting purposes, it spread rapidly. By 1893, it had become a nuisance in north-eastern Victoria and by 1917 it had reached the region west of Kalgoorlie in Western Australia.
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-foxdistrib.jpg
Next to the dingo and feral dog, the fox is the largest land-dwelling, carnivorous mammal in mainland Australia. Foxes are adapted to a variety of different habitats, ranging from deserts to urban environments. However, foxes are not found in tropical Australia or Tasmania. Their local distribution is probably determined by food and supply and available shelter.
Diet
Foxes are opportunistic predators and scavengers with a varied diet of rabbits, hares, rodents, frogs and birds as well as invertebrates such as beetles, grasshoppers and earthworms. Red foxes have been observed to fish, wading stealthily through shallow marshes.
Although primarily carnivores or meat-eaters, fruit including blackberries and apples (in season) can form as much as 90% of the diet.
The survival of many ground dwelling native animals in Australia is affected by red fox predation. Rock wallabies and mallee fowl populations are probably regulated by fox predation. Predation on birds and reptiles appears to be seasonal.
Growth and Reproduction
Foxes breed once a year. Over a period of 2-3 weeks in early winter, females come into oestrus for 2-3 days. Males appear to be fertile throughout winter and early spring.
The fox’s gestation period is 51-53 days. Cubs are generally born in burrows but litters have been found in hollow trees, rock crevices, under houses or in long grass. The average litter size ranges from four to a maximum of ten.
Although red foxes have generally been considered monogamous, communal denning has now been recorded, as well as the presence of “helpers” at the den.
Among red foxes the proportion of vixens which breed varies greatly between areas ranging from 30% to nearly 100%.
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-foxmaxi.jpg
Behaviour
Foxes generally disperse from where they are born at 6-9 months. Dispersal behaviour varies between males and females and between litter mates. Males usually leave first and travel greater distances than females.
Previously, foxes were thought of as solitary, but recent evidence suggests that the fox society is far more complex. European studies have shown that in some areas foxes may live in groups, generally one adult male and several vixens.
Foxes are usually active at night and rest during the day in an earth den (often an enlarged rabbit burrow), thicket, hollow log or leaning tree. In winter, when there is lessons food available, foxes may hunt and scavenge during the day.
Although paths may cross many times each night, foxes with a group tend to forage in different parts of the group territory. Dominant animals monopolize the best habitat.
Male foxes mark a territory of between 250 and 2500 hectares, depending on fox density and availability of food. Territory area and group size are unrelated.
Faeces and urine are used to define territories by scent marking and are left on conspicuous landmarks like tussocks of grass. These scent marks are distributed throughout the fox’s range, especially in places that are visited often.
Dominant animals scent mark with urine more than subordinates do. Individuals can distinguish their own scent from that of others.
Foxes communicate by sound as well as by scent marking and body language. Young foxes use aggressive yapping and a resonant howl in winter, more often in the mating season. Vixens and pups will bark and whimper softly; adult foxes also scream.
Causes of mortality.
Mortality of young foxes in generally high with 20/83% dying in the first year. Hunting, roadkills, disease, food shortage and social factors contribute to mortality.
Most foxes live less than 4 years although 8 year old foxes in the wild have been reported. Mange and distemper are thought to be important causes of mortality in wild populations of foxes.
Predation on livestock.
IN some circumstances red foxes may kill lambs and goat kids. In rural Australia, particularly in New South Wales and Victoria, the red fox is widely perceived to be responsible for the predation of livestock.
Foxes usually attack the throats of lambs and kids; however, some are killed by multiple bites to the neck and back. This may result from young animals being caught while lying down. Foxes do not have the sized and strength to hold and immobilise adult sheep or goats, or to crush large bones; therefore, repeated bites may be required to subdue prey.
Numerous injuries occur when young foxes attempt to kill but lack the experience to attack the throat or other vital areas.
Foxes generally prefer large internal organs and begin feeding through an entry behind the ribs. However, some target the nose and tongue and may consume the head of small prey. Red foxes are noted for carrying small carcasses back to their dens to feed their young, which may account for some poultry, lambs and kids that disappear and are never found.
One way to distinguish fox kills from dingo or wild dog attacks is that foxes rarely cause severe bone damage to stock. Poultry can be badly damaged through fox attacks.
Urban Foxes
Foxes can easily survive in urban environments both in Australia and overseas.
The distribution to urban foxes is dependent on the availability of suitable daytime hiding places. While foxes in urban areas are generally found in remnant bushland or parks, foxes can find refuge under the platform of a suburban railway station, in dens built under floorboards of houses or sheds or in quiet gardens. The availability or distribution of food supply in any given habitat will also affect the distribution of urban foxes. Bushland areas in and around cities provide ideal shelter.
In urban areas, foxes eat a diversity of food types including small birds, worms, insects, fruit and food put out by residents.
Urban foxes will rarely attack people. However, any urban fox is a wild animal and should be treated as such.
Urban foxes can be a nuisance by:
Attacking poultry and livestock in peoples yards
Raiding garbage bins scavenging for food
Digging holes in lawns scavenging for food and
Causing domestic dogs to bark.
Rabies threat
Foxes, along with other feral animals, have the potential to spread diseases such as rabies, should such diseases ever be introduced into Australia. They would also provide a reservoir of infection, making rabies almost impossible to eliminate. Rabies (Latin for madness), is a contagious disease of virtually all mammals, including man. Once symptoms of rabies appear, the virus is always fatal to both humans and animals.
This deadly virus is not established in Australia but is present in Asia.
However, we should not be complacent about the rabies issue. All foxes are capable of contracting and spreading rabies. In the northern hemisphere red foxes are the principle vectors and victims of the disease. Millions of foxes have been slaughtered overseas in unsuccessful attempts to control the disease. Fox populations can withstand up to 75% yearly mortality rates and recover to pre-control population levels. Recovery rates are dependent on immigration rates and breeding.
If rabies does enter Australia, the best hope for eliminating it is probably oral vaccination by dropping fox baits containing anti-rabies vaccine. Preliminary trials in Switzerland and Canada have shown that up to 75% of foxes will eat the bait.
Control
The options for control of foxes in Queensland include poisoning, trapping, shooting and fencing. Poisoning is the most effective large scales control technique available.
Foxes are often killed by 1080 baiting programs which are designed primarily to control dingoes and wild dogs.
The choice of control method should suit the individual circumstances. Poisoning should not occur where there is a risk to domestic animals. Trapping and fencing are used in urban environments.
(Vulpes vulpes).
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-fox.jpg
The most common of the world’s many fox species is the European red fox (Vulpes vulpes). The fox is found on every continent except Antarctica.
Foxes have pointed muzzles, flattened slender skulls, large ears and long bushy tails. Adult foxes weigh 4.5 – 8 kgs.
Under the Rural Lands Protection Act, the fox is a declared animal and cannot be kept in captivity or introduced to Queensland. It is the responsibility of the landholders to control foxes on their own land.
Distribution
The European red fox was deliberately introduced into Australia in 1845. First released near Melbourne for sporting purposes, it spread rapidly. By 1893, it had become a nuisance in north-eastern Victoria and by 1917 it had reached the region west of Kalgoorlie in Western Australia.
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-foxdistrib.jpg
Next to the dingo and feral dog, the fox is the largest land-dwelling, carnivorous mammal in mainland Australia. Foxes are adapted to a variety of different habitats, ranging from deserts to urban environments. However, foxes are not found in tropical Australia or Tasmania. Their local distribution is probably determined by food and supply and available shelter.
Diet
Foxes are opportunistic predators and scavengers with a varied diet of rabbits, hares, rodents, frogs and birds as well as invertebrates such as beetles, grasshoppers and earthworms. Red foxes have been observed to fish, wading stealthily through shallow marshes.
Although primarily carnivores or meat-eaters, fruit including blackberries and apples (in season) can form as much as 90% of the diet.
The survival of many ground dwelling native animals in Australia is affected by red fox predation. Rock wallabies and mallee fowl populations are probably regulated by fox predation. Predation on birds and reptiles appears to be seasonal.
Growth and Reproduction
Foxes breed once a year. Over a period of 2-3 weeks in early winter, females come into oestrus for 2-3 days. Males appear to be fertile throughout winter and early spring.
The fox’s gestation period is 51-53 days. Cubs are generally born in burrows but litters have been found in hollow trees, rock crevices, under houses or in long grass. The average litter size ranges from four to a maximum of ten.
Although red foxes have generally been considered monogamous, communal denning has now been recorded, as well as the presence of “helpers” at the den.
Among red foxes the proportion of vixens which breed varies greatly between areas ranging from 30% to nearly 100%.
http://i89.photobucket.com/albums/k205/griffo79/ferfiles-foxmaxi.jpg
Behaviour
Foxes generally disperse from where they are born at 6-9 months. Dispersal behaviour varies between males and females and between litter mates. Males usually leave first and travel greater distances than females.
Previously, foxes were thought of as solitary, but recent evidence suggests that the fox society is far more complex. European studies have shown that in some areas foxes may live in groups, generally one adult male and several vixens.
Foxes are usually active at night and rest during the day in an earth den (often an enlarged rabbit burrow), thicket, hollow log or leaning tree. In winter, when there is lessons food available, foxes may hunt and scavenge during the day.
Although paths may cross many times each night, foxes with a group tend to forage in different parts of the group territory. Dominant animals monopolize the best habitat.
Male foxes mark a territory of between 250 and 2500 hectares, depending on fox density and availability of food. Territory area and group size are unrelated.
Faeces and urine are used to define territories by scent marking and are left on conspicuous landmarks like tussocks of grass. These scent marks are distributed throughout the fox’s range, especially in places that are visited often.
Dominant animals scent mark with urine more than subordinates do. Individuals can distinguish their own scent from that of others.
Foxes communicate by sound as well as by scent marking and body language. Young foxes use aggressive yapping and a resonant howl in winter, more often in the mating season. Vixens and pups will bark and whimper softly; adult foxes also scream.
Causes of mortality.
Mortality of young foxes in generally high with 20/83% dying in the first year. Hunting, roadkills, disease, food shortage and social factors contribute to mortality.
Most foxes live less than 4 years although 8 year old foxes in the wild have been reported. Mange and distemper are thought to be important causes of mortality in wild populations of foxes.
Predation on livestock.
IN some circumstances red foxes may kill lambs and goat kids. In rural Australia, particularly in New South Wales and Victoria, the red fox is widely perceived to be responsible for the predation of livestock.
Foxes usually attack the throats of lambs and kids; however, some are killed by multiple bites to the neck and back. This may result from young animals being caught while lying down. Foxes do not have the sized and strength to hold and immobilise adult sheep or goats, or to crush large bones; therefore, repeated bites may be required to subdue prey.
Numerous injuries occur when young foxes attempt to kill but lack the experience to attack the throat or other vital areas.
Foxes generally prefer large internal organs and begin feeding through an entry behind the ribs. However, some target the nose and tongue and may consume the head of small prey. Red foxes are noted for carrying small carcasses back to their dens to feed their young, which may account for some poultry, lambs and kids that disappear and are never found.
One way to distinguish fox kills from dingo or wild dog attacks is that foxes rarely cause severe bone damage to stock. Poultry can be badly damaged through fox attacks.
Urban Foxes
Foxes can easily survive in urban environments both in Australia and overseas.
The distribution to urban foxes is dependent on the availability of suitable daytime hiding places. While foxes in urban areas are generally found in remnant bushland or parks, foxes can find refuge under the platform of a suburban railway station, in dens built under floorboards of houses or sheds or in quiet gardens. The availability or distribution of food supply in any given habitat will also affect the distribution of urban foxes. Bushland areas in and around cities provide ideal shelter.
In urban areas, foxes eat a diversity of food types including small birds, worms, insects, fruit and food put out by residents.
Urban foxes will rarely attack people. However, any urban fox is a wild animal and should be treated as such.
Urban foxes can be a nuisance by:
Attacking poultry and livestock in peoples yards
Raiding garbage bins scavenging for food
Digging holes in lawns scavenging for food and
Causing domestic dogs to bark.
Rabies threat
Foxes, along with other feral animals, have the potential to spread diseases such as rabies, should such diseases ever be introduced into Australia. They would also provide a reservoir of infection, making rabies almost impossible to eliminate. Rabies (Latin for madness), is a contagious disease of virtually all mammals, including man. Once symptoms of rabies appear, the virus is always fatal to both humans and animals.
This deadly virus is not established in Australia but is present in Asia.
However, we should not be complacent about the rabies issue. All foxes are capable of contracting and spreading rabies. In the northern hemisphere red foxes are the principle vectors and victims of the disease. Millions of foxes have been slaughtered overseas in unsuccessful attempts to control the disease. Fox populations can withstand up to 75% yearly mortality rates and recover to pre-control population levels. Recovery rates are dependent on immigration rates and breeding.
If rabies does enter Australia, the best hope for eliminating it is probably oral vaccination by dropping fox baits containing anti-rabies vaccine. Preliminary trials in Switzerland and Canada have shown that up to 75% of foxes will eat the bait.
Control
The options for control of foxes in Queensland include poisoning, trapping, shooting and fencing. Poisoning is the most effective large scales control technique available.
Foxes are often killed by 1080 baiting programs which are designed primarily to control dingoes and wild dogs.
The choice of control method should suit the individual circumstances. Poisoning should not occur where there is a risk to domestic animals. Trapping and fencing are used in urban environments.