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Description
As the most numerous predators of the colder northern territories of the world, the Albertosaurines are well-adapted to hunting the vast herds of herbivores that graze the steppes and boreal forests. Though they share habitat with the rarer and more powerful tyrannosaurines, they limit their competition by focusing on differing prey types; in particular, the Alberotsaurines prefer to hunt the hadrosaurs, smaller ceratopsians, and parksosaurs such as the bovisaurs and longicollisaurs with the occasional therizinosaur or ankylosaur when an opportunity arises. Albertosaurines generally avoid sauropods, preferring to leave them to their larger cousins, and they almost never attack the largest, most heavily armed ceratopsians, as they are too dangerous to confront in most cases. Social creatures, they tend to hunt in family groups, with multiple generations often composing the pack structure. Intelligent and often relentless during a hunt, they can spend many days tracking and pursuing prey, strategizing and overwhelming their prey with coordinated strikes. Albertosaurines even go as far to nurse their injured pack-mates back to health, brining food to animals too badly injured to hunt. As a result, they have regained much of their former dominance throughout many temperate and cold regions of the world. Below is a list of some of the genera within this unique subfamily of tyrannosaurids

Struthiotyrannus- A diurnal analog to the Alioramini, this 20-foot, 1600-pound albertosaurine tyrannosaurid is fast, agile and incredible specialized. Mainly pursuing parksosaurs, ornithomimids and struthiotheres, it is often found in mated, nomadic pairs. In regards to prey, Struthiotyrannus is will take any of these aforementioned herbivores, but it is particularly fond of gazellasaurine parkosaurs, the ornithomimid Hadromimus, and the small hadrocursorin hadrosaurs such as Anatocursor. It can run upwards of 50 mph, fast enough to catch them provided they cannot see it coming. Native to the grasslands and steppes of North America and Eurasia, it hunts by chasing prey over long distances, tiring its victims with bites to the caudofemoralis muscles in the tail, which disables the prey's ability to run. Only creating a territory during the mating season, a pair will lay a large clutch of eggs, which they bury in grassy mounds to incubate them. When chicks are born, they grow exceedingly fast in the first year in order to keep pace with their parents as they migrate and follow the herds. They will leave their parents by their third year, when their growth begins to slow and they near adult size. Very few babies get to this age, and nearly 90% of a clutch of 20-25 hatchlings die within their first year, often to predators and attrition and the animals will not mature until the age of ten years old. Those that survive generally are too fast for most other predators to catch. However, many larger or pack-hunting predators such as large dromaeosaurids and other tyrannosaurids will readily steal their kills, leading to them having to hunt more frequently in order to maintain their metabolisms.

Neogorgon (Plains-Sprinter)- A powerful pack-hunter found throughout the Northern steppes, grasslands and forests of Eurasia and North America all the way up to the icy tundra, Neogorgon is a powerful and versatile hunter measuring up to 30-feet long and weighing up to three tons. Clad in warm feathers that vary in color depending on its population locality, it is an incredibly social animal, with some large packs ranging up to 20 individuals strong. Each pack is ruled by an alpha pair, which lay most of the eggs. Most other pack members are surviving offspring from previous years or siblings related to one or both alpha animals. A specialist in hunting hadrosaurs, smaller ceratopsians in the 20-25 foot range, and large parksosaurs such as the bovisaurs and longicollisaurs, this theropod tracks its prey over long distances before attacking in a swift burst of speed and powerful, bone-crunching bites. As a pack, they often use tactics like chasing prey into ambushes to make a kill. Chicks are born in the summer after eggs are laid in spring, and young often are large enough to travel across the territory with the pack by winter. When hunting, the pack leave its offspring in the care of another pack-mate who takes on the role of protector and baby-sitter. While generally formidable enough to drive off most potential threats, even the largest pack of Neogorgorn know better than to challenge the largest tyrannosaurs, such as the cold-loving Lobotyrannus or the enormous and highly intelligent Vastatotyrannus.

Description
As the most numerous predators of the colder northern territories of the world, the Albertosaurines are well-adapted to hunting the vast herds of herbivores that graze the steppes and boreal forests. Though they share habitat with the rarer and more powerful tyrannosaurines, they limit their competition by focusing on differing prey types; in particular, the Alberotsaurines prefer to hunt the hadrosaurs, smaller ceratopsians, and parksosaurs such as the bovisaurs and longicollisaurs with the occasional therizinosaur or ankylosaur when an opportunity arises. Albertosaurines generally avoid sauropods, preferring to leave them to their larger cousins, and they almost never attack the largest, most heavily armed ceratopsians, as they are too dangerous to confront in most cases. Social creatures, they tend to hunt in family groups, with multiple generations often composing the pack structure. Intelligent and often relentless during a hunt, they can spend many days tracking and pursuing prey, strategizing and overwhelming their prey with coordinated strikes. Albertosaurines even go as far to nurse their injured pack-mates back to health, brining food to animals too badly injured to hunt. As a result, they have regained much of their former dominance throughout many temperate and cold regions of the world. Below is a list of some of the genera within this unique subfamily of tyrannosaurids

Struthiotyrannus- A diurnal analog to the Alioramini, this 20-foot, 1600-pound albertosaurine tyrannosaurid is fast, agile and incredible specialized. Mainly pursuing parksosaurs, ornithomimids and struthiotheres, it is often found in mated, nomadic pairs. In regards to prey, Struthiotyrannus is will take any of these aforementioned herbivores, but it is particularly fond of gazellasaurine parkosaurs, the ornithomimid Hadromimus, and the small hadrocursorin hadrosaurs such as Anatocursor. It can run upwards of 50 mph, fast enough to catch them provided they cannot see it coming. Native to the grasslands and steppes of North America and Eurasia, it hunts by chasing prey over long distances, tiring its victims with bites to the caudofemoralis muscles in the tail, which disables the prey's ability to run. Only creating a territory during the mating season, a pair will lay a large clutch of eggs, which they bury in grassy mounds to incubate them. When chicks are born, they grow exceedingly fast in the first year in order to keep pace with their parents as they migrate and follow the herds. They will leave their parents by their third year, when their growth begins to slow and they near adult size. Very few babies get to this age, and nearly 90% of a clutch of 20-25 hatchlings die within their first year, often to predators and attrition and the animals will not mature until the age of ten years old. Those that survive generally are too fast for most other predators to catch. However, many larger or pack-hunting predators such as large dromaeosaurids and other tyrannosaurids will readily steal their kills, leading to them having to hunt more frequently in order to maintain their metabolisms.

Neogorgon (Plains-Sprinter)- A powerful pack-hunter found throughout the Northern steppes, grasslands and forests of Eurasia and North America all the way up to the icy tundra, Neogorgon is a powerful and versatile hunter measuring up to 30-feet long and weighing up to three tons. Clad in warm feathers that vary in color depending on its population locality, it is an incredibly social animal, with some large packs ranging up to 20 individuals strong. Each pack is ruled by an alpha pair, which lay most of the eggs. Most other pack members are surviving offspring from previous years or siblings related to one or both alpha animals. A specialist in hunting hadrosaurs, smaller ceratopsians in the 20-25 foot range, and large parksosaurs such as the bovisaurs and longicollisaurs, this theropod tracks its prey over long distances before attacking in a swift burst of speed and powerful, bone-crunching bites. As a pack, they often use tactics like chasing prey into ambushes to make a kill. Chicks are born in the summer after eggs are laid in spring, and young often are large enough to travel across the territory with the pack by winter. When hunting, the pack leave its offspring in the care of another pack-mate who takes on the role of protector and baby-sitter. While generally formidable enough to drive off most potential threats, even the largest pack of Neogorgorn know better than to challenge the largest tyrannosaurs, such as the cold-loving Lobotyrannus or the enormous and highly intelligent Vastatotyrannus.