Bactrosaurus ("Bactrian lizard") was a herbivorous dinosaur that lived in east Asia during the late Cretaceous, 97 - 85 mya. A typical Bactrosaurus would have been 6 metres (20 ft) long and 2 metres (6.6 ft) high when standing on all fours, and weighed 1.1 to 1.5 tonnes (2,400 to 3,300 lb), with an 80 centimetres (2.6 ft) femur. The position Bactrosaurus occupies in the Cretaceous makes it one of the earliest known hadrosaurs, and although it is not known from a full skeleton, Bactrosaurus is one of the best known of these early hadrosaurs, making its discovery a significant finding.

Camptosaurus ("Bent lizard") is a genus of plant-eating, beaked dinosaurs of the Late Jurassic and Early Cretaceous periods. The largest adult camptosaurs were more than 7.9 metres (26 ft) long, and 2 metres (6.6 ft) at the hips. They had heavy bodies but, as well as walking on four legs (quadrupedal), they could rear up to walk on two legs (bipedal). This genus is probably closely related to the ancestor of the later iguanodontid and hadrosaurid dinosaurs. It probably ate cycads with its parrot-like beak.

Corythosaurus ("Helmet lizard") was a genus of duck-billed dinosaur from the Upper Cretaceous Period, about 75 million years ago. It lived in what is now North America. Corythosaurus weighed in at 4 tonnes and measured roughly 10 metres (35 ft) from nose to tail. Like other hadrosaurs it had a toothless beak, the back of the jaws contained a dental battery composed of hundreds of small, interlocking teeth. These were used to crush and grind plant matter and were continually replaced as they wore away.

Dryosaurus ("Oak lizard") was a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont (formerly classified as a hypsilophodont). Dryosaurus had a long neck, long, slender legs and a long, stiff tail. Its 'arms', however, with five 'fingers' on each 'hand', were short. It was about 8 to 14 feet (2.4 to 4.3 m) long, five feet (1.5 m) tall (at the hips) and weighed 170 to 200 pounds (77 to 91 kg). Its eyes were quite large, leading many to believe that it possessed excellent eyesight. Dryosaurus had a horny beak and cheek teeth and, like other ornithopods, was a herbivore. Some scientists suggest that it had cheek-like structures to prevent the loss of food while the animal processed it in the mouth. It was probably a herd animal, which raised and protected its young after hatching. A quick and agile runner with strong legs, Dryosaurus used its stiff tail as a counter-balance. It probably relied on its speed as a main defense against carnivorous dinosaurs.

Edmontosaurus is a genus of crestless duck-billed dinosaur. The fossils of this animal have been found in rocks of western North America that date from the late Campanian stage to the end of the Maastrichtian stage of the Cretaceous Period, between 73 and 65.5 million years ago. It was one of the last non-avian dinosaurs, and lived alongside Triceratops and Tyrannosaurus shortly before the Cretaceous–Tertiary extinction event. Edmontosaurus was one of the largest hadrosaurids, measuring up to 13 meters (43 ft) long and weighing around 4.0 metric tons (4.4 short tons). It is known from several well-preserved specimens that include not only bones, but in some cases extensive skin impressions and possible gut contents. It is classified as a hadrosaurine hadrosaurid (those hadrosaurids which lacked a hollow crest), and was closely related to Anatotitan, if not the same animal.

Heterodontosaurus ("Different toothed lizard") is a genus of small herbivorous dinosaur with prominent canine teeth which lived in the Early Jurassic of South Africa. It was similar to a hypsilophodont in shape, and ate plants, despite its canines. Heterodontosaurus was a small, fleetfooted ornithischian that reached a maximum size of about 3 feet. It had a long, narrow pelvis and a pubis which resembled those possessed by more advanced ornithischians. More unusual was that the hand of Heterodontosaurus had five fingers, two of which seem to be opposable. This configuration allowed Heterodontosaurus to grasp and manipulate food. The bone in the foot and ankle were fused in a manner reminiscent of those in birds.

Hypacrosaurus ("Near the highest lizard") was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight. It is known from the remains of two species that lived about 76 to 68 million years ago, in the Late Cretaceous of Alberta, Canada, and Montana, USA, and is the latest hollow-crested duckbill known from good remains in North America. Hypacrosaurus is most easily distinguished from other hollow-crested duckbills (lambeosaurines) by its tall neural spines and the form of its crest. The neural spines, which project from the top of the vertebrae, are 5 to 7 times the height of the body of their respective vertebrae in the back, which would have given it a tall back in profile. The skull's hollow crest is like that of Corythosaurus, but is more pointed along its top, not as tall, wider side to side, and has a small bony point at the rear. The animal is estimated to have been around 9.1 meters long (30 feet), and to have weighed up to 4.0 tonnes (4.4 tons).

Hypsilophodon is an ornithopod dinosaur genus from the Early Cretaceous period of Europe. It was a small bipedal animal with an herbivorous or possibly omnivorous diet. Abundant fossil remains found in England indicate that Hypsilophodon reached about 2 metres (6.6 ft) in length and would have weighed between 50 to 70 kilograms (110 to 150 lb). Like most small dinosaurs, Hypsilophodon was bipedal and ran on two legs. Its entire body was built for running; a light-weight, minimized skeleton, low, aerodynamic posture, long legs and stiff tail for balance all would have allowed it to travel remarkably fast for its size.

Iguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs. Many species of Iguanodon have been named, dating from the Kimmeridgian age of the Late Jurassic Period to the Cenomanian age of the Late Cretaceous Period from Asia, Europe, and North America. Iguanodon was a bulky herbivore that could shift from bipedality to quadrupedality. The best-known species, I. bernissartensis (and there may be only one), is estimated to have weighed about 3.08 tonnes (3.5 tons) on average, and measured about 10 metres long (32.8 ft) as an adult, with some specimens possibly as a long as 13 metres (42.6 ft).

Lambeosaurus ("Lambe's lizard") is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet. Several possible species have been named, from Alberta (Canada), Montana (USA), and Baja California (Mexico), but only the two Canadian species are currently well known. At about 15 meters (50 ft) long, the Mexican species L. laticaudus was one of the longest ornithischians. The other species were more modestly sized.

Leaellynasaura was a small herbivorous ornithopod dinosaur of about 60-90 cm in length from the earliest Cretaceous, first discovered in Dinosaur Cove, Australia. It was an Australian polar dinosaur. At this period in time, Victoria would have been well within the Antarctic Circle, which is now very cold. This means that Leaellynasaura was living and apparently thriving much further south than any reptile could today. This is particularly relevant due to Cryolophosaurus being discovered in Antarctica, thus further suggesting the idea that dinosaurs could live under conditions which were once thought unsuitable for their kind. It is possible that the sun would not have risen for several weeks or months in the winter, depending on latitude, which means that Leaellynasaura would have had to live in the dark for perhaps months at a time. This is particularly relevant to the fact that Leaellynosaura had very big eyes and its brain had large optic lobes, as if it had evolved to be routinely active in the dark. Regardless, the fact that it lived in extremely cold temperatures led many scientists to believe that Leaellynasaura was warm-blooded.

Lesothosaurus was a 1 metre (3.3 ft) long, bipedal plant-eater. Its long legs, small arms, and slender tail all suggest that it was a fast runner; it would have resembled a large lizard walking bipedally. The small skull of Lesothosaurus was short and flat, with large eye sockets. It had large cavities for the eye and jaw muscles. It had a short, pointed snout, and the lower jaw may have ended in a beak. Its teeth were pointed with grooved edges, and would have been ideal for chewing tough plant matter. The skull was mounted on a short but flexible neck. The hind limbs of Lesothosaurus were much longer than the forelimbs, which were quite short with small, five-fingered 'hands'. The length of the rear legs indicates Lesothosaurus was a fast, agile runner. The distinctive femur has a unique femoral head not seen in other dinosaurs. Lesothosaurus lived in the hot, arid conditions of Lesotho and South Africa, during the Early Jurassic. Remains of Lesothosaurus have been collected from the Upper Elliot Formation, dating it to the Early Jurassic.

Maiasaura ("Good mother lizard") is a large duck-billed dinosaur genus that lived in the area currently covered by the state of Montana in the Upper Cretaceous Period (Campanian), about 74 million years ago. Maiasaura was large, attaining an adult length of about 9 meters (30 feet) and had the typical hadrosaurid flat beak and a thick nose. It had a small, spiky crest in front of its eyes. The crest may have been used in headbutting contests between males during the breeding season. This dinosaur was herbivorous. It walked both on two (bipedal) or four (quadrupedal) legs and appeared to have no defense against predators, except, perhaps, its heavy muscular tail and its herd behaviour. These herds were extremely large and could have comprised as many as 10,000 individuals.

Muttaburrasaurus is a genus of herbivorous ornithopod dinosaur related to Camptosaurus and Iguanodon, from what is now northeastern Australia between 100 and 98 million years ago during the early Cretaceous Period. After Minmi, it is Australia's most completely known dinosaur from skeletal remains. Muttaburrasaurus was capable of either bipedal or quadrupedal movement. The three middle digits of the forelimb were joined together into a hoof-like pad for walking on. Muttaburrasaurus had very powerful jaws equipped with shearing teeth. These were probably an adaptation for eating tough vegetation such as cycads. It also had an enlarged, hollow, upward-bulging muzzle that might have been used to produce distinctive calls or for display purposes. However, as no fossilised nasal tissue has been found, this remains conjectural. Muttaburrasaurus was about 7 to 9 meters long and its mass was between 1 and 4 tons. It also had a spiked thumb, which was about 15cm long.