Facts about the animal kingdom

15 Blue Animals in Nature

Josie F. Turner
By Josie F. Turner, Journalist specialized in Animal Welfare. Updated: April 30, 2024
15 Blue Animals in Nature

If you are thinking of blue animals in nature, certain birds, insects or even reptiles might spring to mind. However, not everything is as it seems. Many blue animals only appear blue to the human eye, but this is due to the dispersion of light. It's a similar trick of the eye which makes the oceans appear blue, even though the water is actually clear. But whether they are true blue or only appear this way, they are some of the most stunning sights in nature.

AnimalWised brings you our list of 15 blue animals in nature and provides names, characteristics and photos to help you know what to look out for. Keep reading to discover more.

You may also be interested in: 15 Animals That Pollinate
  1. Are there blue animals?
  2. Blue jay
  3. Blue morpho butterfly
  4. Tanzania electric blue gecko
  5. Blue iguana
  6. Blue coral snake
  7. Strange blue animals
  8. Blue dragon
  9. Greater blue ringed octopus
  10. Little blue heron
  11. Peacock
  12. Blue poison dart frog
  13. More blue animals
  14. Blue surgeonfish
  15. Spix's Macaw
  16. Blue crayfish
  17. Moor frog
  18. Betta fish
See more >>

Are there blue animals?

The majority of the animals we consider to be blue actually only appear that way. This is due to something known as structural coloration, a common feature in nature. The structure of the animal's body creates the illusion of blue or other different colors. In birds, the feathers contain microscopic crystal structures which create the illusion of blue color when light shines on them. Similar occurrences happen on the scales of fish and reptiles.

Structural coloration doesn't mean animals lack color pigment. Often the coloration is due to the pigment and the light interacting with each other. Certain pigments will look blue when diffused through these structures, even though they are not. One of the best examples of this phenomenon is the chameleon. The chameleon has different types of color-bearing cells called chromatophore. Lower layers have dark melanin and upper layers have yellow and red pigments, but no blue. It is only when the light is refracted through iridophores (iridescent chromatophores) that the structural coloration takes place. The result is often a striking iridescent blue which can help them hide from predators in nature.

There are some species which are true blue. This means they actually have blue pigment which gives them their blue color. Some species of frog and insect have true blue pigment, but they are in the vast minority of animals which appear blue. Whether they appear blue or are actually blue, here follows some of the most beautiful blue animals in nature. We start with blue animals in nature that live in forests.

1. Blue jay

The blue jay (Cyanocitta cristata) is a bird species native to North America. It mainly inhabits forest areas, but they can frequently be observed in certain parks and cities. Its plumage is light blue with black details on the upper body while the abdomen is white. Additionally, their pronounced crest of feathers on the top of the head makes it easier to differentiate them from other species.

Blue jays can feed on almost anything from branches, plants, leaves, flowers and fruits, to worms, chicks of other birds, insects or even human refuse. They build their nests on almost any tree species. Once built, the blue jay will lay a maximum of 5 eggs which incubate within 15 days.

15 Blue Animals in Nature - 1. Blue jay

2. Blue morpho butterfly

The blue morpho butterfly (Morpho menelaus) is one of the most beautiful blue animals in the world. They are found in the forests of Central and South America. They are characterized by the blue color of their wings and their size which can reach up to 20 cm in length. As one of the largest butterfly species in the world, they are renowned in arts and media. Despite their ability of flight, they spend the majority of their lives on the forest floor or among bushes. There they find their food which consists mainly of caterpillars, plants and nectar.

If you want to know more about the blue morpho and butterflies in general, you can check out these fascinating facts about butterflies.

15 Blue Animals in Nature - 2. Blue morpho butterfly

3. Tanzania electric blue gecko

William's dwarf gecko (Lygodactylus williamsi) is a reptile native to the island of Tanzania. There it lives in the Kimboza forest in a single type of tree the Pandanus rabaiensis. Geckos are very small animals, measuring only 10 cm in length. Their tail is long relative to the body and the legs allow it to move with great speed through the terrain. They are aggressive animals with their mating partners, especially males.

The color of the males is bright blue, while the females can vary in green and brown tones. However, both are orange on the lower part of their body. Their color has made them very desirable in the pet trade which is paryl whey they are now threatened. Known as electric blue gecko as a pet, they are heavily regulated in many areas to try to help conservation.

15 Blue Animals in Nature - 3. Tanzania electric blue gecko

4. Blue iguana

The blue iguana (Cyclura lewisi) is a reptile native to the Grand Cayman Island, where it lives both in forests and in gardens, roads and in the vicinity of towns. They hide in cavities found in trees, rocks or soil. It is one of the herbivorous blue animals in nature feeding on fruits, seeds, flowers and plants.

They are also one of the largest types of iguana, measuring 1.5 m long. Their tail is the longest of all iguanas being 60 cm at length in adults. The blue hue of this species is accentuated during mating season when colors vary between gray and dark blue. They are excellent climbers and move with great ease and agility.

15 Blue Animals in Nature - 4. Blue iguana

5. Blue coral snake

The blue coral snake (Calliophis bivirgata) is one of the most beautiful and dangerous snake species i the world. Their deadliness is due to their potentially lethal poison. This coral snake is over a meter in length and the hue of its scales varies between dark blue and black. However, their head and tail are deep red. It is one of the blue animals in nature that live in forests of countries such as Indonesia, Malaysia, Singapore and Thailand where they feed on other snakes.

15 Blue Animals in Nature - 5. Blue coral snake

Strange blue animals

In nature there are animals with such strange characteristics it is difficult to believe that they are from this world. However, their strangeness is simply because they are not well-known to people.

Here the blue animals in nature which can be considered strange:

6. Blue dragon

The blue dragon (Glaucus atlanticus), you may be surprised to know, is not actually a dragon. It is actually a blue sea slug which is characterized by its blue and silver hues. They measure about 4 cm long and lives in temperate waters around the world. Although it is most commonly found around the European, African and Australian coasts.

Glaucus is a genus of sea slug and there are a few blue glaucus animals. This species has a small bladder which is located in its stomach which inflates and deflates. This allows them to stay afloat in water without touching the surface. As with many other sea slugs, they can absorb the venom of other animals and use it for themselves, often to a more lethal extent.

15 Blue Animals in Nature - 6. Blue dragon

7. Greater blue ringed octopus

The greater blue-ringed octopus (Hapalochlaena lunulata ) is a species that measures 10 cm in length and weighs 80 g. As the name implies, this animal has a variety of blue rings around its skin, while the rest of its body has yellowish or reddish tones.

Animals in nature have various habitats. Among the blue animals in the ocean, this octopus stands out for being flexible and fast. They are also able to move easily through its environment. In addition, they are very territorial, unlike the rest of octopus species. Their diet is rich in diversity, eating various shrimp, fish and crustaceans which they catch thanks to their powerful tentacles and its lethal poison.

15 Blue Animals in Nature - 7. Greater blue ringed octopus

8. Little blue heron

The little blue heron (Egretta caerulea) is a long necked bird with long legs and a sharp beak. This beak is noted for its beautiful blue coloration. They are carnivorous and consumes fish, frogs, lizards and turtles. The reproduction phase occurs between the months of June to September, at which time it lays 2 to 4 eggs. The blue color is not the only hallmark of this animal, since it also measures 60 cm long and weighs around 300 g.

15 Blue Animals in Nature - 8. Little blue heron

9. Peacock

The peacock (Pavo cristatus) is perhaps one of the most striking animals in the world, both for its elegant appearance and for its colorful plumage. This animal displays sexual dimorphism, a trait which means females and males are different in morphology. Females are smaller than males and lack the striking feathers for which they are so famous. This is why only the males are considered blue animals.

The tail contains beautiful feathers which display a variety of colors, including blue, but the body of the male is almost entirely blue. They use their tails in an incredible mating ritual which involves a complicated series of dances and moves. They are native to the Asian continent, but can now be found almost anywhere in the world.

15 Blue Animals in Nature - 9. Peacock

10. Blue poison dart frog

The blue poison dart frog (Dendrobates azureus) is an amphibian that is characterized by its metallic blue color. In nature, this color is used to warn potential predators of the great danger they would be in if they tried to eat them. The poison is secreted through the skin, so merely touching the frog can de deadly. They live in Suriname in forested and humid areas, close to water sources. It is very common to observe them both on the ground or climbing on trees. As with most frog species, they lay their eggs near water sources. They can live up to 8 years of age in the wild.

15 Blue Animals in Nature - 10. Blue poison dart frog

More blue animals

We finish by providing adding five additional blue animals in nature you may or may not have heard of. Do you recognize any of them?

11. Blue surgeonfish

The blue surgeonfish (paracanthurus) is a saltwater fish most prized for its intense blue color which contrasts with the yellow color of its tail. They measure around 40 cm in length and lead a solitary lifestyle, inhabiting the Pacific reefs. They do not show an obvious sexual dimorphism, but it is the males who perform most of the courtship ritual. Also known as the blue tang, you may know them as the basis for the character Dory in the Disney movie Finding Nemo.

15 Blue Animals in Nature - 11. Blue surgeonfish

12. Spix's Macaw

The spix's macaw (Cyanopsitta spixii) is a another blue animal species from nature that became popular thanks to a movie. This one is the animated film Rio. However, this animal, known as "arara" in their home country, is in critical danger of extinction as there are hardly any specimens left. Some of the causes are deforestation, pollution, climate change, lack of resources and illegal trafficking of the species.

15 Blue Animals in Nature - 12. Spix's Macaw

13. Blue crayfish

The blue crayfish (Procambarus alleni) is an endemic species of Florida, United States. It is relatively common as an aquarium animal in their home country. Although the species is brown in the wild, selective breeding has provided this bright cobalt blue color.

15 Blue Animals in Nature - 13. Blue crayfish

14. Moor frog

The Moor frog (Rana arvalis) is an amphibian that can be found mainly in Europe and Asia. It is small in size, measuring between 5.5 and 6 cm. They have a smooth body with brown and reddish tones. However, during a short period of time, during the reproduction, the male acquires a bright blue hue and then regains its usual colors. This makes it one of the few temporarily blue animals on our list.

15 Blue Animals in Nature - 14. Moor frog

15. Betta fish

While not all betta fish are blue, there are some which display and incredible blue color. This varies according to species and colors can change within the same species. To know more, look at the different types of betta fish and see the different range of their colors.

15 Blue Animals in Nature - 15. Betta fish

If you want to read similar articles to 15 Blue Animals in Nature, we recommend you visit our Facts about the animal kingdom category.

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15 Blue Animals in Nature