Fox breeding takes place once a year, with red foxes mating during winter and cubs usually being born in spring. After a gestation period of around 53 days, a vixen typically gives birth to a litter of four or five cubs.
This guide explains fox mating season in the UK, pregnancy, birth and how fox cubs develop before becoming independent.
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Fox Mating Season
Fox breeding takes place once a year, with the fox mating season in the UK occurring during winter. Red foxes become more vocal and mobile at this time as males and females find mates, defend territories and begin the annual breeding cycle.
When Do Foxes Mate?
Foxes usually mate during winter, with much of the activity occurring from December to February. January is a particularly noticeable period of red fox mating, when calls and increased movement can make breeding activity easier to hear or see.
During mating, foxes may remain physically joined for a period in what is known as a copulatory tie. This is a normal part of fox reproduction, and the animals separate naturally.
Fox Mating Season in the UK
The UK fox mating season is concentrated in winter so cubs can be born in spring. After mating, the female, known as a vixen, prepares a secure den or earth where the litter can be born and sheltered.
Screaming, barking and other vocal activity can become more noticeable during the fox breeding season. Our guide to fox mating sounds explains the calls associated with mating and territorial behaviour.
Fox Gestation and Birth
Fox pregnancy lasts for about 53 days, with cubs normally being born in early spring. This fox gestation period allows the young to begin developing as conditions become more favourable during spring.
Fox Gestation Period
The fox gestation period for a red fox is approximately seven and a half weeks, or about 53 days.
During the later stages of fox pregnancy, the vixen spends more time around the den. After the cubs are born, the male and sometimes other members of the family group may help provide food.
When Are Fox Cubs Born in the UK?
Fox cubs in the UK are usually born from March into April, with births commonly peaking around mid-March.
Fox cubs are born inside a den, which may be an underground earth or, in urban areas, a sheltered space beneath a shed or other structure. The timing of birth follows the winter fox mating season and the roughly 53-day pregnancy.
How Many Fox Cubs Are in a Litter?
A typical red fox litter contains around four or five cubs.
Fox litter size is not fixed and can vary between individual vixens and breeding seasons. Both parents may contribute to cub care, particularly while the young remain dependent around the den.
Fox Cubs and Development
Fox cubs develop quickly during spring and summer, changing from blind, dependent newborns into mobile young foxes that can explore outside the den. Fox cub development is an important part of the fox life cycle, with feeding, play and exploration supporting increasing independence.
For broader information about activity, habitat and life outside the breeding cycle, see our guide to fox habitat and behaviour in the UK.
Newborn Fox Cubs
Newborn fox cubs are blind and deaf and have dark grey or brownish fur. They depend on their mother for warmth and milk during their earliest weeks.
Their eyes and ears begin opening at around two weeks, while their coat gradually changes as they develop. During this stage the cubs remain closely dependent on the vixen and the security of the den.
When Do Fox Cubs Leave the Den?
Fox cubs usually begin emerging from the den at around four weeks old. At first they remain close to the den and explore only short distances.
By around six to eight weeks they are usually weaned and spend more time above ground. This stage of the fox life cycle marks a gradual shift from den dependence towards wider exploration and greater independence.
How Long Do Fox Cubs Stay With Their Mother?
Fox cubs remain dependent on their mother and family during their early development, with independence increasing through spring and summer.
By around six months they are fully grown, and many young foxes leave the family area in autumn to find territories of their own. The exact timing can vary between individuals and local conditions.
Sources: RSPCA – Foxes in the UK: facts, behaviour and habitats; RSPCA – Fox Cubs; Mammal Society – Red Fox; Natural History Museum – The Secret Life of Urban Foxes.
Frequently Asked Questions
Red foxes normally breed once each year. Mating takes place during winter, followed by a gestation period of around 53 days and the birth of a single litter in spring. The exact timing can vary between individual foxes and local conditions.
Red foxes can reach sexual maturity during their first year. Young foxes are considered sexually mature at around ten months, and some females may produce their first litter when they are about one year old.
Both parents can contribute to raising fox cubs. The vixen remains closely associated with the newborn litter, particularly during the first weeks, while the male and sometimes other members of the family group may help provide food.
A female fox is called a vixen. The term is commonly used when describing fox breeding, pregnancy and cub care. A young fox is called a cub, while an adult male fox may simply be referred to as a male fox or dog fox.