Rats are mammals in the order Rodentia. The phrase who is the head of rats usually asks about the dominant animal in a group or the most important rat species people see.
In everyday speech, it can also mean the rat that seems to lead the others in a colony or nest.

Rats do not have a single “head” in the human sense, so the phrase usually points to dominance, not anatomy. If you are trying to identify a rat, the shape of the head, snout, ears, and neck can tell you a lot about the animal and its species.
What The Phrase Usually Means

The phrase can point to either a dominant rat in a social group or the head region of a rat’s body. In biology, people look at rat external anatomy and structures of the head and neck, not a true “leader.”
The Anatomical Head Of A Rat
A rat’s head contains the sensory and feeding tools that help it survive. These include the eyes, ears, whiskers, mouth, and jaw.
A rat’s vocalization and scent communication also help it interact with other rats.
Why Rats Do Not Have A Single Leader
Rat groups show dominance behavior, but they do not organize like a human hierarchy with one permanent boss. Social rank shifts with age, size, food access, and aggression, so the “head” of rats is the animal with the strongest current influence.
Head And Neck Anatomy In Brief

A rat’s head and neck help it sense, gnaw, and move quickly through tight spaces. These features connect to the body, and the rat tail helps balance and movement.
The neck supports the skull and airway.
Key External Features
You usually notice the pointed snout, long whiskers, small ears, and strong incisors first. These traits are part of rat external anatomy and help you tell rats from mice and other small mammals.
Important Internal Structures
Inside the head and neck, you find the brain, salivary glands, trachea, thyroid region, and other connected tissues. These structures of the head and neck support feeding, breathing, and sensory processing.
What Rat Dissection Shows
A rat dissection makes these structures easier to locate because the external landmarks match the internal layout. You can see how the skull protects the brain and how the jaw muscles anchor near the face.
The neck connects the head to the chest.
Which Rat Species People Usually Mean

When people say “rat,” they often mean a few common rat species in the genus Rattus. The names brown rat, black rat, roof rat, and ship rat can overlap by region, and other animals in Muridae may also be called rats.
Brown Rat And Norway Rat
The brown rat, also called the Norway rat, is usually what people mean in homes and cities. The scientific name is Rattus norvegicus.
Many domestic rats and pet rats come from this species.
Black Rat, Roof Rat, And Ship Rat
The black rat is Rattus rattus. People may also call it the roof rat or ship rat.
These names often refer to the same species, especially in older port cities, attics, and high spaces.
Other Animals Called Rats
Not every animal called a rat belongs to Rattus. Names such as pack rat, kangaroo rat, bandicoot rat, hoffman’s rat, sulawesian white-tailed rat, rice-field rat, philippine forest rat, and osgood’s rat can describe different rodent species within Muridae or related groups.
Why Rat Identification Matters

Correct identification helps you judge health risks and choose the right control method. A rat population in a building may need different handling than a colony outdoors.
This is especially true when rat patrol focuses on burrows, entry points, and feeding sites.
Health Risks And Zoonotic Pathogens
Rats can carry zoonotic pathogens that matter to people and pets. These include plague, bubonic plague, the black death, leptospira, leptospirosis, toxoplasma gondii, and campylobacter.
Rats Around Homes And Structures
You can use a rat’s head shape, teeth, and body size to spot whether you are dealing with a brown rat or a roof rat.
Good identification helps you clean up and keep rats out more effectively, since the right response depends on how the animal uses its head and neck and where it travels.