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Animal Facts

All informative and interesting articles about the world of animals. Curiosities about fauna, information about the animal kingdom, its protection and many other contents about the species that compose it.

Fruit bats. By Jeffrey Paul Wade / Shutterstock.com

Perception in the animal kingdom: three unique information systems

Having an accurate perception of the environment is vital in the day to day of any animal and fundamental to its survival. Usually, they can perceive and interpret their surroundings quite easily, through basic senses, like sight, hearing or smell. However, some animal groups have developed a series of complex sensory organs...
Humpback Whale Heatrun. By Tomas Kotouc | Shutterstock.com

Cetaceans. The small and giant mammals of the oceans

We’re all able to recognise a dolphin, an orca or one of the whale species. These animals are part of the order of cetaceans (Cetacea). But…. Did you know that there are 80 species of cetaceans, and that there are huge differences between them? What is a cetacean? The first thing to...
Big herd of wildebeest is about Mara River. By Gudkov Andrey | Shutterstock.com

Biogeographic movements: dispersal, dissemination and migration

Over half a century ago, Biogeography appeared in the scientific landscape as a new modern science, as a response to the urge to understand and manage the impact of human activity on the planet, which was causing the alteration of the habitats of species. But what exactly is Biogeography?...
Close up portrait of a grey wolf (Canis Lupus) also known as Timber wolf in the Canadian forest during the summer months. By FOTOimage Montreal | Shutterstock.com

The Grey Wolf. Our changing relationship with one of Europe’s apex predators

The legend You close your eyes and picture a wolf. Your mind will probably conjure up a snarling canine with pointed ears, wide eyes and sharp, white teeth. This is the image that forms in early childhood, reinforced by stories and folklore. We all know Aesop’s cautionary fable, The Boy...
Wolf tracks (footprint) in the frozen snow. By Maksymus | Shutterstock.com

Field guide: identifying animal footprints, traces and signs

Habitat loss or destruction is a direct consequence of our current economic and social system, as well as one of the greatest threats to animal species and to wildlife sustainability. Biodiversity reduction and the extinction of species are some of the devastating effects of this degradation, which is at...
Corvus corax, raven. By fernando sanchez | Shutterstock.com

The feathered ape: crows, ravens and human culture

What are Corvids? And what are ‘True Crows’? The Corvidae family is made up of more than 120 species of bird. In English, we commonly refer to them as the crow family, but it would be more accurate to call them Corvids. This family includes choughs, jays, nutcrackers and magpies,...
Sexual selection. Great crested grebe. By Pim Leijen | Shutterstock.com

Reproductive strategies and mating systems: the foundations of sexual selection in animals

For many years, it has been been thought that living beings were basically organisms that are born, grow, reproduce and die, or that they were organisms that fulfilled their physiologic functions: nutrition, relation and reproduction. Such statements are, with some nuances, valid definitions of a “living being” and they...
San Miguel Island Fox. By Dominic Laniewicz | Shutterstock.com

Do all animals face the same extinction risk?

As mentioned in the article "The IUCN Red List of Threatened Species: conservation status of species", published recently in this blog, the International Union for the Conservation of Nature (IUCN) has updated the number of species included in the Red List. It now consists of a total of almost...
Fennec fox. By hagit berkovich | Shutterstock.com

Too hot? Too cold? How animals survive in extreme temperatures

In Barcelona, summer has just arrived. Temperatures are rising and behaviours begin to change. We start to drink more, wear less and switch on the air-conditioning in our homes and offices. Nevertheless, as people travel around the city, there is no shortage of red faces and sweaty bodies! These are...
Knobbed Hornbill, Rhyticeros cassidix, from Sulawesi, Indonesia. By Ondrej Prosicky | Shutterstock.com

Birds, their different beaks and the functions they perform

Birds are a class of vertebrates with more than 18,000 different species. Of the various features that are common to all birds, perhaps the most characteristic is their beak. All birds have one, but it has evolved differently in each species has evolved to improve its functions in response...
Twins sisters with Appaloosa horse and Dalmatian dogs in rainy autumn park. By Julia Shepeleva | Shutterstock.com

Do other animals give birth to twins? Examples from the animal kingdom

Assuming you’re human, the likelihood of having twins is quite little. But, depending where you’re from, there’s a surprising amount of variation. In Central Africa, the twinning rate is almost 30 in every 1,000 births; in much of Asia and Latin America, the average is as low as eight...
The Amazon molly does not produce any male offspring. The females reproduce asexually through gynogenesis. Nevertheless they need sperm to trigger the cloning process. By Manfred Schartl

The Amazon molly: the small fish making a big splash in science

What is the Amazon molly and how did it get its name? The Amazon molly (Poecilia formosa) is a small, inconspicuous freshwater fish. It belongs to a genus of around 40 fish species, which includes the well-known guppy. Amazon mollies are omnivores and spend their days feeding on small invertebrates,...
An adorable sugar glider (Petaurus breviceps) climb on the tree. By Arif Supriyadi | Shutterstock.com

8 fascinating animal facts about 8 different species

A spider that eats birds? An animal with five hands? An amphibious antelope? This week's article features eight animal facts related to their feeding habits, physical characteristics and where they live. The feathers of some sacred and exotic birds Quetzals (Pharomachrus) are a very striking and colourful birds, which inhabit the forests and jungles...
Ants and aphids in symbiosis. Photo by inkwelldodo | Shutterstock.com

Symbiosis in the animal kingdom. Mutualism, commensalism and parasitism

Sometimes, completely different species or organisms forge close or interdependent relationships, to the advantage of at least one of the parties involved. This interaction is called 'symbiosis'. It's not easy to come up with a narrow definition of symbiosis. In fact, symbiotic relationships can be divided into several groups: Clownfish swimming...
A silhouettes of cranes in flight. By Sergey Uryadnikov | Shutterstock.com

The incredible journeys of migratory birds

The second Saturday in October is observed as World Migratory Bird Day, an event dedicated to one of the most outstanding annual phenomena in the animal kingdom: bird migration. Although many animal species migrate long distances every year, the case of birds has always drawn a lot of attention,...