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Predator and Prey

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by

Kevin Goodenough

on 5 May 2014

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Transcript of Predator and Prey

Predator and Prey Characteristics:
Skulls and Teeth

Why Should I know about
Skulls and Teeth?
Skulls/teeth are the most
definitive
way of
identifying
animals.
Imagine going for a hike with friends and finding an animal skull on the ground and having the knowledge to tell them what it is!
You can tell what type of
food
they eat based on what types of teeth they have
It is a great way of telling the
health and age
of the animal/s
Predator / Prey Characteristics
Vision
Another skull characteristic in determining what type of animal you are examining is the location of the
orbits
(eye sockets).
Predator (carnivore/omnivore) eye sockets are located in a
forward
position on the skull providing these animals with
binocular vision,
which gives them the ability to judge distance (depth perception).
Warm Up
Take a look at the following skulls and make a prediction on your note sheet whether it is a carnivore (eats meat only) or an herbivore (eats plants only)
Predators are animals that
eat other animals
Predators are always
carnivores
(eat meat only, ex: tiger) or
omnivores
(eat meat and vegetation, ex: black bear)
Prey are animals that are
eaten
by other animals
Prey may be carnivores, omnivores OR
herbivores
(eat vegetation only, ex: deer)
When examining skulls and teeth, make sure to look for key
identifying
characteristics of a carnivore, omnivore or herbivore
The man's job in this video is to prepare skulls and skeletons for sale to museums/schools to preserve and study them.
Why is it important to understand what the differences are between different types of animal skulls and skeletons?
Prey (herbivores) eye sockets are located on
the side
of the skull providing these animals with
monocular vision
, which gives these animals nearly a 360 degree field of view.
"Eyes in the front, the animal hunts. Eyes on the side, the animal hides."
Teeth Can Tell Us the Most
By examining the animal's teeth carefully, we can
determine
whether the animal is a carnivore, herbivore, or an omnivore.
All mammals are heterodonts
Types of teeth:
Incisors - any of the four front teeth in each jaw, used for
cutting
and gnawing.
Canines - long, pointed teeth used for
piercing
and holding prey.
Molars and Pre-molars - used for grinding and
chewing

Carnivores:
large canines
, molars, pre-molars, small incisors
Molars and pre-molars overlap, like scissors, creating a shearing action. These teeth are called
carnassials
Herbivores: large incisors, tiny canines that act more like incisors, grinding molars and pre-molars.
Incisors/canines
absent
on upper law
Omnivores: large canines, large incisors, carnassial pre-molars,
rounded
(for grinding) molars
Have a
combination
of carnivore and herbivore teeth
Canine Teeth
#1
#2
#3
#4
#5
Exit Question
How do teeth help us identify a random skull found in the forest?
Young deer teeth
Old deer teeth
Full transcript