1. Is Ratty your favourite?
Water Vole
(Probably) Britain's fastest declining wild mammal.
Water voles are the UK’s largest vole species and are often confused with brown rats, in fact 'Ratty' (of Wind in the Willows) was actually a water vole! Water Voles like to sit down and eat in one place, so heaps of gnawed grass can sometimes be seen along the edge of a waterway.
Credit: Philip Braude/The Mammal Society
Is Ratty your favourite?

2. Is the red squirrel your favourite?
The red squirrel was historically common across the UK. Since the introduction of non-native grey squirrels in the early 20th century their numbers have declined. The grey squirrels have contributed to the decline through competition (better feeders) and the spread and transmission of squirrelpox virus.
Credit: Samuel Hood/The Mammal Society
Is the red squirrel your favourite?

3. Is this UK bat species your favourite?
Soprano pipistrelle
These are the bats that you are most likely to see.
These animals weigh about the same as a 20 pence coin. They have a fast and hectic flight as they chase insects that they consume on the wing. A single individual can consume up to 3000 insects in one night!
Credit: Maurice Flynn/The Mammal Society
Is this UK bat species your favourite?

4. Is the only marine mammal on the list your favourite?
Bottlenose Dolphin
Did you realise that we have dolphins in the UK?
In UK waters, there are several hundred resident bottlenose dolphins. Dolphins are highly social and intelligent mammals. Individuals have complex relationships with one another. Females can even sometimes act as midwives, helping other females give birth by pushing the calf up to the surface to breathe
Credit: Nick Clayton
Is the only marine mammal on the list your favourite?

5. Are these reintroduced mammals your favourite?
Beaver
The beaver became extinct in the UK in the 16th century.
Beavers were hunted extensively for food, fur and even their scent glands. Beavers are ‘keystone species’ – they have a disproportionately large effect on the rest of the ecosystem. This can create favourable conditions for many other species to live. Small numbers of beavers have been reintroduced to the UK due to the range of benefits they provide to both wildlife and humans.
Credit: Paul Scott/The Mammal Society
Are these reintroduced mammals your favourite?

6. Is this elusive feline your favourite?
Scottish Wildcat
Nicknamed the ‘Tiger of the Highlands’.
Although they look similar to tabby cats, wildcats are larger and have bushier tails. This mammal is rare, and the UK population could be as few as 400. The biggest threat to the Scottish wildcat is the domestic cat, because they can hybridise to produce fertile offspring. This threatens the genetic integrity of the species, meaning it is difficult to find a ‘pure’ wildcat.
Credit: Emma Telford/The Mammal Society
Is this elusive feline your favourite?

7. Is this rare mammal your favourite?
Pine Marten
Solitary, secretive and mostly nocturnal
The pine marten is one of the UK's rarest carnivores. These cat-sized mammals are very rare and not very well known. There are around 3500 individuals in Scotland, but there could be fewer than 100 in England and Wales. Pine martens prefer woodland and are talented climbers, spending most of their time in trees. They can even leap up to four metres between branches!
Credit: Adrian Hinchcliffe/ The Mammal Society
Is this rare mammal your favourite?

8. Is the otter your favourite?
Perfectly adapted to their semi-aquatic life.
Otters have webbed feet, streamlined bodies and a muscular tail, allowing them to swim at a speed of about one metre per second. Otters dive underwater to catch small fish and can see just as well under water as they can above it. From a distance they look like mink, but they are in fact much larger.
Credit: John Hunt/The Mammal Society
Is the otter your favourite?

9. Is it this spiny mammal your favourite?
Hedgehog
Hedgehogs are the only spiny mammals in Britain.
They can hibernate between November and March, allowing them to save energy when food is hard to come by. Famously hedgehogs protect themselves from predators by rolling into a ball and erecting their spines. Hedgehog numbers are unfortunately declining across the UK, the greatest threat is habitat loss from agricultural change.
Is it this spiny mammal your favourite?

10. Is the fox your favourite UK mammal?
Red Fox
Intelligent, opportunistic, unfussy mammals.
These mammals are opportunistic and make use of a variety of habitats. In the UK for instance, foxes have adapted very well to urban environments. Foxes hunt with keen senses of smell and hearing, and likely use the latter to find earthworms, which can make up a large portion of their diet
Credit: Ian Wade/The Mammal Society
Is the fox your favourite UK mammal?