In a famous Marvel series, X-men are superheroes who mutated from exposure to stimuli. This article is a story of similar superheroes mutating for climate adaptation. X-animals!

Every organism is trying to survive climate change. The species may develop a new organ, and characteristics or even transform into a whole new species during the period. Some may even succumb to the climate issue and lose their existence. 

Here are the ten animals that have already shown transformation because of climate threats. 

Table of Contents

1. Table corals 

Massive Table Corals
Massive table corals | Image Credit – Flickr
Species NameAnthozoa
LocalityThe great brief barrier
Cause for MutationHigh temperature
MutationResistant against bleaching

During her expedition into the ocean off the coast of the phoenix islands, what Anne Cohan saw was unprecedented. 

In 2018, the disastrous EL Nino weather system two years earlier had caused the water around the mid-pacific by nearly 3 degrees celsius.

Usually, corals are sensitive to high temperatures and expel the colorful symbiotic algae that nourish them. They bleach, starve, and die during the process. 

While many of the table corals were expiring right before her eyes, she saw a ray of hope. A species that was evolving to thrive against higher temperatures.

A study in April regarding table corals suggests that the species can adapt to resist bleaching in warmer water. 

An experiment was performed to test the corals from colder and warmer pools and their reaction to increasing heat.

The corals from the hot pools, as expected, bleached less than the ones from the cool pools. It concluded that some corals are adapting to survive the scorching climate issues. 

Because they can withstand high temperatures, the number of table corals is proliferating. 

A verdict from the University of Queensland’s scientist and study co-author Professor Peter Mumby’s research papers stated that table corals promoted high recovery rates. 

2. Pink salmon 

Pink salmon 
Pink salmon | Image Credit – Flickr
Species NameO. gorbuscha
LocalityBoth sides of the North Pacific
Cause for MutationHigh temperature 
MutationEarly migration

Anadromous fish in the salmon family, the pink salmon, is the smallest and most abundant of the pacific salmon. 

While in the ocean, pink salmon are bright silverfish, whereas, in the spawning streams, they change their color to pale grey on the back with a yellow, white belly.

Pink salmon migrate very often for environmental benefits. Migration is a crucial tool for pink salmon to survive: the fish swim from the ocean and up freshwaters to spawn.

It reached a point when pink salmon was decreasing drastically. Companies’ expansion and fishing threatened the existing number until the Alaskan government banned fish traps.

One pink salmon species in Alaska migrated about two weeks earlier than 40 years back. 

Perplexed scientists looked for the cause of the phenomenon. After tallying both genetic and migratory data over 32 years, they figured out the reason. 

The research team found that the frequency of a genetic marker for late migration dropped significantly between 1983 and 2011. By 2012, the late migrating fish only made up about 10 percent of the population. 

The temperature adaptive nature developed in the species is making them more resilient. The population has been more steady than ever over the last decade. 

3. Tawny owls 

Tawny owls 
Tawny owls | Image Credit – Flickr
Species NameS. aluco
LocalityAcross Eurasia and North Africa
Cause for MutationHot temperature
MutationIncrease in brown tawny owls 

The stocky and medium-sized owl’s underparts are pale with dark streaks, and the upper body may be brown or grey; the tawny owl is native to Eurasia and North Africa. 

The IUCN listed the species in the least concern category. A nocturnal bird can hunt successfully at night because of its vision and hearing adaptations and its ability to fly furtively.

They come in two shades: brown and less brown. Owl’s skin color solely depends upon a pigment called pheomelanin stored in its plumage. The pigment is produced as per the habitat. 

The pale brown colors help them camouflage in the surroundings to avoid predators.

As per the habitat, they change their colors. Brown birds dominate in the more humid climate of western Europe, with the grey morph becoming more common further east.

All the owls are a cold grey color in the northernmost region. Siberian and central Asian subspecies have grey and white plumage. 

In the winters of Finland, researchers discerned that over the last 48 years, there was a nationwide increase in the numbers of brown owls.

Scientists don’t understand what advantages could the brown owl have over other owls. They even don’t know the exact genetics behind the tawny owls. 

There is still no data to follow up on which individuals will do better during natural selection.

4. Banded snails 

Banded snails 
Banded snails | Image Credit – Flickr
Species NameR. aldabrae
LocalityWestern Europe and Central Europe
Cause for MutationIncrease in temperature
MutationYellow shells

The banded snail is a medium-species species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicidae. The white-lipped snail, the relative of the grove snail, is slightly smaller than the grove snail.

The species is indigenous to western Europe and central Europe. The species of snail creates and uses love darts while mating. Species’ eggs are measured up to 2mm.

In the banded snails, the colors of the snail are determined not only by the genes but also by body temperature. According to scientists, the warmer temperature in Europe makes the lighter coloration more dominant. 

Global change biology published one study discovering that banded snail populations illustrated at 16 sites in the Netherlands during 1967 and again in 2010 had a proliferating proportion of yellow shells compared to brown ones. 

The area has also seen a 1.5 to 2 degrees Fahrenheit increase in annual temperature over the 43 years. 

However, another study published in PLOS ONE in 2011 found no difference in the prevalence of light-colored shells across the board. 

The researchers hypothesize that individual snails are changing to regulate their body temperature to cope with climate change. 

5. Red squirrel 

Red squirrel 
Red squirrel | Image Credit – Flickr
Species NameS. vulgaris
LocalityNorth America
Cause for MutationHigh temperature
MutationBirth time shift 

The red squirrel is a squirrel species and an arboreal, primarily herbivorous rodent. 

In recent years, the number of red squirrels has decreased profusely in Great Britain, Ireland, and Italy, however increasing in North America. The cause behind the declination is the eastern grey squirrel. 

The red squirrel has a head-to-body length of 19 to 23 cm. The males and females of the species are of the same size. The tails of the squirrels are very crucial for day-to-day activities.

The long tail helps the squirrel balance and steer when jumping from tree to tree and jumping in between branches and may be used for warmth during sleep. 

The temperature has increased in southwest Yukon, resulting in warm spring and a drier environment. 

The phenomenon results in white spruce trees producing more cones. The more cones the females eat, the earlier they give birth. 

After speculating about the red squirrel near Kluane, Canada, researchers came up with a compelling theory that the birthing time has been shifting almost two days per year over the last ten years. 

Although birthing time may vary slightly, the team describes that the data are only explicable if some of the changes are attributed to genetic changes inherited over generations. 

6. Great tit

Great tit
Great tit | Image Credit – Flickr
Species NameP. major
LocalityEurope, Middle East, Central Asia
Cause for MutationGenetic trigger
Mutationcaterpillars’ peak and bird numbers drop

A widespread, common species throughout Europe, the middle east, central Asia, and the east across the Palearctic to the amur river, and some parts of North Africa, the great tit is a passerine bird in the tit family Paridae. 

The species is very distinctive, with a black head and neck, prominent white cheeks, olive underparts, and yellow underparts. The great tit is significant at a length of 12.5 to 14.0 cm. 

With prevailing climate threats, all the organisms are slowly learning to adapt, So is the great tit. The prey of great tits is tackling the climate issue by maturing earlier as spring comes earlier.

However, the great tits arent changing their schedule to hatch when the caterpillars’ peak and bird numbers drop. It is causing a decrease in the number of birds.

As with the hibernating mosquitoes, the species have a genetic trigger that stimulates them to lay eggs when spring arrives. 

The study of 833 great tits in Huge veluwe over 32 years found a greater selection for birds that could vary their egg-laying time to match the caterpillar’s arrival. 

7. Three-spined stickleback 

Three-spined stickleback
Three-spined stickleback | Image Credit – Flickr
Species NameG. aculeatus
LocalityCoastal freshwater habitats of the Northern hemisphere 
Cause for MutationOcean warming
MutationMoms are training their offspring underwater 

A species that is a subject of interest to physiologists, the three-spined stickleback is a fish native to most inland and coastal waters of 30 degrees north. 

It morphs based on its range. Many populations are anadromous and very accepting of changes in the salinity of the water. 

The species rarely reaches a height of 8cm, while 3-4 centimeters at maturity are more common. 

It consumes terrestrial prey fallen to the surface and cannibalizes eggs and fries. The species have a coddling father that takes care of all the meat parenting and building.  

As the north sea has warmed up by 7.2 degrees Fahrenheit by 2100, even the moms are worried about the offspring.

The parents are developing a trait to cope with ocean warming. A study suggests that the moms are preparing their offspring to acclimatize to a new environment. 

Lisa shama, a coastal ecologist at the Alfred Wegener Institute for Polar and Marine Research in Germany, said that the mothers are training their unborn young to live in warmer water by probably passing on Messenger RNA about the water temperature. 

8. Pitcher plant mosquito 

Pitcher plant mosquito 
Pitcher plant mosquito | Image Credit – Flickr
Species NameWyeomyia smithii
Cause for MutationWarm climate 
MutationDelayed hibernation

The pitcher plant mosquito is the type of inquiline mosquito that completes its preadult life cycle in the phytotelmata of the purple pitcher plant. 

The species is the top-level predator in the micro-community of bacteria, rotifers, protozoa, and midges. A species that determine the pitcher’s bacterial diversity is a nonpest species.

It is a nonpest species. The northern US population does not consume blood, while the southern us population only consumes blood after laying the initial egg batch. 

They are the only mosquito species known to have both obligatory biting and non-biting populations in the same species. 

In the marsh of eastern North America, the larvae of pitcher plant mosquito hibernate in winter and morph into fully grown adults in spring after thriving on the nectar inside their namesake plant. 

As the days become shorter, the mosquitos are programmed to hibernate. The species has already adapted to delay hibernation during the longer growing seasons in the southern end. The northern populations are also hibernating later as the temperature rises.

As per the study in 2001, the genetic changes responsible for the shift can manifest in as little as five years. 

The change in hibernation behavior happens even faster if the selection pressure is more substantial.

9. Red-billed gull 

Red-billed gull 
Red-billed gull | Image Credit – Flickr
Species NameC. novaehollandiae
LocalityNew Zealand
Cause for MutationWarm Weather
MutationWeight Loss

Native to New Zealand, found all over the country and on outlying islands, including the Chatham Islands and subantarctic islands, the red-billed gull was considered a separate species. However, now it is treated as a subspecies of the silver gull. 

A reasonably small gull with an all-red bill, red eyering, red legs and feet, pale gray wings, and black wingtips, the red-billed gull has no visual difference between males and females. The species exudes aggressive behavior.

Staying skinny pays off in the scorching temperatures. Scientists have discerned that certain animal body types are more suited for climate change. Let us take an example of a red-billed gull. It is a relatively small species.

Over time, the weight loss of the species is not a genetic anomaly but a deliberate choice to cope with rising global temperatures. Data since 43 years ago are taken into account to release the red-billed gulls’ weight loss verdict. 

German biologist Carl Bergmann theorized that warmer winters would benefit from trimmer frames. As per the theory, the small frames have more skin relative to physical volume, so there is more skin surface to dissipate heat.

He also believed that the animals maintain less internal heat if there isn’t much fat, to begin with. The rule is usually applicable to mammals and birds, but there are some exceptions.

10. Fruit flies 

Small fruit fly
Small fruit fly | Image Credit – Flickr
Species NameDrosophila
LocalityAll temperate regions of the world 
Cause for MutationHot Air pushed from Africa
MutationHeat tolerant

Fruit flies consist of two main species: Drosophilidae and tephritidae. Drosophilidae is a species of smaller flies, whereas Tephritidae is a family of enormous, colorfully marked flies. 

Over time the fruit flies adapt to increasing heat. Research performed under the jurisdiction of Universitat Autònoma de Barcelona in Spain has found that the flies have evolved to be more heat tolerant. 

When hot air from Africa pushed into the Iberian peninsula and much of western Europe, the heatwave peaked in Spain, and the temperature reached its extremity.

They went out in the field four times a year with nets, even in the hot temperatures. Biologists love fruit flies, and they have been a subject of experiments since the early part of the 20th century.

Wrapping Up

Evolution is inevitable, but climate change is not. While Climate change forces some species to evolve, it eradicates many known species. Extinction is controlled if climate change is handled well. 

(Last Updated on May 16, 2022 by Sadrish Dabadi)

Saurav Khadka, with his A levels in computer science from Saipal Academy, owns a keen desire to know more about the environment. He wants to preach his knowledge to others by learning through his hobbies; reading, writing, traveling, and watching movies. He believes sharing his insight regarding a sustainable environment will undoubtedly generate positive perceptions in the people.