Last updated: July 23, 2019
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It is found in lake, pools and river which are freshwater. The distribution is in South of Canada, North of United State, South Carolina and North of Florida. They are besides found in the Missouri River at far north as the Gavins Piint Dam at Yankton, South Dakota.

The IUCN has list this polo-neck as a threatened species. It had been subjected to international protection and listed under CITIES III which will restrict its exportation in the United State

The major ground to this is the loss of its home ground and hunting of the polo-necks. The home ground of the polo-necks is lost due to H2O pollution and utilize up of land by the increasing human population. The polo-necks have been hunted for their valuable shells. They are besides made into soup which is considered by any to be a daintiness.

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Physical Adaptations to their Habitat

Adults of Macrochelys temminckii have strong base dress suits which is long and thick, capable of assailing marauders that harm them therefore ensuing in the absence of nature marauder except homo.

Macrochelys temminckii rely on their strong jaws for defense mechanism and make a difficult bite in defense mechanism if disturbed.

Their sturdy shells protect them from any directed force or injury.

They are besides camouflaged to increase opportunities of endurance in their home ground.

In their camouflaged oral cavity, they have vermiform extremity on the tip of their lingua to entice fish

Assorted characteristics/habitats/unique facts

Macrochelys temminckii are the largest fresh water polo-necks.

The polo-necks are besides called “ dinosaurs ” in the turtle universe due to its crude expressions.

They can weigh over 175lbs with an mean grownup size of 2 pess long. Male polo-necks are usually larger than female polo-necks.

The immature of Macrochelys temminckii are normally brown in coloring material with unsmooth shells and long dress suits whereas grownups are of a solid grey, brown, black or olive-green shadiness and frequently covered with algae to maintain the polo-neck camouflaged.

For camouflaging intent, they besides have bright xanthous forms around the eyes to interrupt the lineation of the oculus.

Macrochelys temminckii has an mean velocity of 0.42mph.

They spend most of their clip in H2O, except for the females which are nesting on the land. They remain inactive in the H2O. With algae, they are about unobtrusive by fishes.

To capture their quarry, it utilises their crisp and powerful jaws or tips to rupture their prey apart. The turtle possess a vermiform on their oral cavities. They lie motionlessly in the H2O with their oral cavities broad unfastened and they would writhe their linguas similar to a worm ‘s motion to pull fishes.

They have big, heavy caput and long, thick tail with dorsal ridges of big graduated tables. Their shells have three keels along it with excess scutes along the side.

About 2 months after the early spring, the females will delve the nest at least 50 paces from H2O to forestall inundation and lay approximately 9 to 25 eggs. The sex of babes is dependent on the temperature at which eggs are hatch. It takes approximately 100 to 140 yearss to hatch. Their life anticipation can be about 150 old ages.

Scientific Name: Geochelone nigra abingdoni

Common Name: Lonesome George

Distribution of species: Pinta Island, Galapagos Archipelago

Wildlife Conservation Status

The Galapagos tortoises are listed on Appendix I of CITES. They are classified as Vulnerable ( VU ) whereas Geochelone nigra abingdoni is listed as Extinct in the Wild ( EW ) on the 2010 IUCN Red List of Threatened Species.

Menaces to Population

Galapagos tortoises are chief beginnings of valuable fresh meat and dilute piss as imbibing H2O for the crewmans. More of the population were hunted for high class “ turtle oil ” . Peoples from the early colony of the island hunted them for nutrient and cleared their home grounds for agricultural usage. Mammal species introduced provender on their eggs and immature whilst cowss and donkeys reared undergo interspecies competition with them for grass as nutrient.

Physical Adaptations to their Habitat

Long cervixs and notch in their shell allow Galapagos tortoises to make for the leaf on cactus workss grown as nutrient beginning for endurance and fast growing rate.

Carapace ( big shell ) made of bone with bone plates built-in to the skeleton and fused with the ribs presents a strong protective shield to a manque marauder.

Large graduated tables on their legs additions protection as they meet their cubituss front when retreating to protect their caput.

Pillar-like legs are structured to back up their weight and facilitate motion.

Scaly tegument on exposed legs and caput besides acts as armor to forestall harm due to motion around their home ground.

Assorted characteristics/habitats/unique facts

Fully grown grownup can weigh over 300lbs and make length up to 4 pess long.

Their life anticipation is about 150 old ages.

Galapagos tortoises are herbivorous with a diet of fresh immature grass, bristly pear cactus, leaves, vines and fruits. The dew and sap in flora provides them wet, particularly Opuntia cactus.

Galapagos tortoises can last for a twelvemonth without nutrient or H2O. They are able to hydrolyze their organic structure fats to bring forth H2O.

In smaller and drier islands such as Espanola and Pinta, Galapagos tortoises in these topographic points tend to hold “ saddleback ” shells which are flatter than “ domeback ” shells, elevated above the cervix and flared above the hind pess. With longer cervix and limbs, they are able to make for taller flora. Furthermore, they are smaller and necessitate less nutrient.

Galapagos tortoises are slow-moving with an mean velocity of 0.18mph.

At dawn, the tortoises readily enjoy for two hours, absorbing the energy before going active once more, wallowing in H2O or clay for about eight hours daily. These are thermoregulatory responses and protections from parasites ( mosquitoes & A ; ticks ) .

They are believed to be deaf due to their deficiency of reactions towards sounds from near.

Copulating occurs at any clip of the twelvemonth with seasonal extremums. Head-biting occurs during competition for the female and normally tortoise with longer cervix wins.

The female digs nests in countries with dry, flaxen land and makes a boggy stopper out of piss and leaves to incubate the eggs. In bouldery countries, the eggs are indiscriminately laid into clefts. Temperature of incubation of eggs determines sex of babes and it takes 100 to 200 yearss for them to hatch.

Galapagos tortoise exhibits symbiosis with finch. The finch picks ticks hidden in the creases of the tegument on the tortoise ‘s stretched cervix, liberating the tortoise from harmful parasites and supplying itself an easy repast.

Specific name

Macrochelys temminckii

Geochelone nigra abingdoni

Common name

Alligator Snapping Turtle

Lonesome George

Wild Conservation Status


Extinct in Wild

Menaces to Population

Loss of home ground due to H2O pollution

Hunted for shells and meat

Hunted as nutrient beginning and for turtle oil

Interspecies competition



175 pound

300 pound

Size ( length )

2 pess

4 pess

Life anticipation

150 old ages

150 old ages

Average Speed

0.42 miles per hour

0.18 miles per hour

Classification ( eating wonts )



Physical Features

Sharp-edged oral cavity

Three keels and excess scutes along shells

Smooth-edged oral cavity

Flatter “ saddleback ” shells, elevated above cervix and flared above hind pess.


Defense mechanism system

Strong base tail for assailing

Strong jaws for difficult bite

Hardy shells as shield


Hardy shells as shield

Scaly tegument on legs and caput as armor

Feeding Adaptations

Sharp-edged jaws enhance appreciation of objects

Camouflaged oral cavity and vermiform extremity on tip of lingua to entice fish

Long cervix and notch in shells allows stretching for leaf

Able to hydrolyze their organic structure fast for H2O if starved


Daily wonts

Rarely bask

Remain motionless in H2O for most of the twenty-four hours

Bask after morning for 2 hours

Wallow in clay or H2O for most of the twenty-four hours


Nests dug at least 50 paces from H2O to forestall inundation

9 to 25 eggs laid each clip

Time taken for hatching is 100 to 140 yearss.

Nests dug in dry country are made of boggy stoppers whereas in bouldery countries, eggs are indiscriminately laid into clefts

2 to 16 eggs laid each clip

Time taken for hatching is 100 to 200 yearss.