Hi there. You have found my free coloring pages blog with hundreds of drawings I have done for you to print and color. It has been several days since I last posted. I have been recovering from surgery and subsequent hospital stay. And before that, I will tell you that I was really struggling with my breathing and swallowing. In any case, I am back and although I have not been posting I HAVE been drawing. So... today I am starting a post of several types of reptiles that I have drawn. It will probably take a few days to get all the pages posted. Being at the computer is rather challenging right now.
About reptiles or Class: Reptilia... Reptiles are vertebrates, so they have a backbone and internal bones. They are generally cold-blooded and have scaly skin. They tend to lay leathery eggs on land. Evolutionarily they were the precursors to mammals. So I have even included a drawing of mammal-like reptiles that gave rise to mammals. I have also included dinosaurs, although most biologists and paleontologists would probably put dinosaurs in either Dinosauria or Aves. The Theropod dinosaurs are usually now considered Aves or a type of bird. I am also including Pterosaurs and Marine Reptiles, both of which are often confused with dinosaurs.
I am also including modern reptiles such as turtles, tortoises, snakes, crocodilians, lizards, etc. Some of the drawings are more detailed/realistic and some are more cartoon drawings for younger kids.
Again, please understand that I can not post all of them today. I have to take it easy and typing on the computer is painful. Here is the first drawing. It is set in the oldest age of early reptiles.
Edaphosaurus chased by Dimetrodon
These two animals are from the Early Permian Period of the Paleozoic Era. They are NOT dinosaurs, although toy Dimetrodons are often found in packages of toy dinosaurs. Dimetrodon was a predator and Edaphosaurus was an herbivorous prey species. Both were some of the earliest mammal-like reptiles. Dimetrodon means two-length teeth. It was the first animal with fangs. They both lived in what is now Europe and North America between 275 mya and 295 mya. MYA = million years ago. This drawing is a rather simple depiction of the two actual animals. (It is not exactly perfectly accurate, but it is a recognizable drawing of the two animals.) They lived in the early Permian Period, many million years before the first dinosaur appeared. So they were NOT dinosaurs. The printable version of this drawing is found by clicking on the Paleontology button and then scrolling down to the bottom of the Paleozoic section of the Paleontology list. Then click on the title and print the drawing to color.
Diichtodon killed by Postosuchus
Diictodon was one of the mammal-like reptiles. It lived in burrows and was about half a meter in length. Postosuchus was the T. rex of the Triassic Late Triassic Period. Here we see it feeding on a Diichtodon. The animal in the background is a large tusked herbivore called Placerias. An adult Postasuchus would have been around 13 feet or 4 meters long. So this would have to be a juvenile Postaoschus since Diictodon was only about 19 or 20 inches long. Surprisingly, none of THESE animals are dinosaurs either. Although it looks much like a dinosaur, Postosuchus was more closely related to crocodilians, not dinosaurs. The Theropod dinos did NOT evolve from Postosuchus. The printable version of this drawing is found by clicking on the Paleontology button and then scrolling down to the bottom of the Mesozoic section of the Paleontology list. Then click on the title and print the drawing to color. Have fun coloring.
Crocodile Mommy and Son 
Ichthyotitan the Biggest Marine Reptile
The first found fossils of Ichthyotitan were found a few years ago by an 11-year-old girl.
The fossils were found near the same place as Mary Anning found the first known Ichthyosaur. The 11-year-old girl is named Ruby Reynolds. The fossils of Ichthyotitan were enormous. They turned out to be a few of the bones of quite possibly the biggest marine reptile ever. Icthyotitan was an Ichthyosaur. It was shaped vaguely like a dolphin... only a HUGE dolphin! It is estimated to have been 82 feet long! That is 25 meters long! There IS some evidence of a larger Ichthyosaur but there is speculation that it may be another sample of Ichthyotitan.
The two Pterosaurs that are seen in the sky are Rhamphorhynchus and Caelestiventus. They are both Pterosaurs from the late Triassic Period, so they did live at the same time as Ichthyotitan. To get to the printable version of this drawing just click on the Paleontology button and scroll down to the bottom of the Mesozoic section of the list.
Mosasaur hunting Plesiosaur
This is a drawing of the Cretaceous Sea. It includes a Mosasaur and a Plesiosaur. Plesiosaurs were long-neck marine reptiles. Previously it was thought that Mosasaurs had a a long flat tail. Now tail flukes have been found on some Mosasaurs so possibly all of them had tail flukes or tail fins. This is a smaller - possibly subadult Mosasaur hunting a Plesiosaur. There are a few other animals in the drawing, like the shelled floating Ammonites on the lower left and a crab near the lower right. These animals were all living in the Late Cretaceous Period. Plesiosaurs actually also lived in the Jurassic Period. As far as size, the Mosasaurs could get to be 55 feet long. Some Plesiosaurs could get to the length of 50 feet, with much of that length made up of their long skinny neck. FYI some Plesiosaurs (called Pliosaurs) had short necks and they were the kings of the sea in the Jurassic Period. Remember that THIS is a drawing of the Cretaceous Sea, not the Jurassic Ocean. This drawing, in printable form, is found by clicking on the button labeled Paleontology. Then scroll down to the bottom of the Mesozoic part of that page. Click on the title and you will get your coloring page.
Pliosaur hunts an Ichthyosaur
Pliosaurs are short-necked Plesiosaurs. One of the more well-known ones is Liopleurodon. It is seen here about to attack an Ichthyosaur. Opthalmosaurus was an Ichthyosaur with large eyes for seeing in deep and dark water. The Opthanlmosaurs is about to bite into its favorite prey, an Ammonite. But the poor Opthalmosaurus is not aware that it is about to become lunch for the Liopleurodon. To be clear, Liopleurodon was a short-necked Plesiosaur called a Pliosuar. Opthalmosaurus was a type of Ichthyosaur. It was considerably smaller than the Ichthyotitan that is further up this post. Opthalmosaurus was around 20 feet (6 meters) long and marine reptiles from the Liopleurodon genus were somewhere between 16 and 85 feet (5-25 meters) long.
To find this drawing in printable form just click on the button labeled Paleontology and then scroll down to near the bottom of the Mesozoic Life section of the page. Have fun coloring!
That is about all I can handle posting right now. More Reptile drawings coming maybe later today.
