Species: Sphyyrna zygaena (Hammerhead Shark)
Physics Application: Hammerhead sharks, like other sharks, have the ability to detect electricity through use of electroreceptors found around the mouth, however it has been found that Hammerheads can detect variations in the magnetism found in underlying rock. Where homo sapiens study such things classified as "Paleomagnetism", Hammerheads are able to sense, perhaps by sight, where magnetized lava creates invisible landmarks, which may be used a "hidden roads" used to navigate at night. Also, the form of the shark’s head allows for ultra sensitivity to distortions in the Earth’s magnetic field. However, electromagnetic waves from submarines confuse the sharks as they are capable of detecting the machines, which are presently in a stage of redesign for the very reason.

Species: Amphibia Urodela Salamandridae (Newts). Includes Mertensiella luschani (Caucasus newt) and Triturus marmoratus (Marbled newt)

Species distinctions: Caucasus newt:
Weight: n/a
Body length: 8.0 to 12.0 cm ( 3.0 to 4.75 in)
Diet: insects, ants, larvae
Distinctive qualities: a miniature salamander, occurring only in valleys in Caucasus mountains and selected areas of Asia minor; extremely rare amphibian; nocturnal; slow movement except when catching prey; land-dwelling

Species distinctions: Marbled newt:
Weight: n/a
Body length: 12.0 to 16.0 cm ( 4.75 to 6.5 in)
Incubation period: 12 to 15 days
Number of eggs: 200 to 400 (small mounds or singly)
Diet: small aquatic animals, crustaceans, insect grubs, slugs, caterpillars, worms
Distinctive qualities: largest of European newts; covered in green and black mottling; bulky body; males acquire high crest with wavy edge on back during spring; lives in cool, damp regions; much dependency on other newts
Physics Application: In times of danger, newts may use biomagnetism to escape their predators across ponds, where they may navigate to their home pond from a less than 12.9km (8.0 miles) after roaming the floor of the forest during their development as adolescents. It is believed they use light-activated receptors and iron-based receptors.

Species: Cheloniidae caretta (Loggerhead Sea turtle)
Physics Application: These sea turtles are known to nest in the south eastern United States, where the young hatch from their eggs, then find their way to the sea, where they spend years, traveling five to ten years before returning to the same breeding region in which they had been hatched. From studies which discovered magnetite within the brains of the turtles, scientists have formed the theory that the turtles find their way back to the grounds where they had hatched by use of the magnetite. The magnetite may be used to sense both the magnetic field that run parallel and perpendicular to the earth, much like a grid found on a map, there each point of the earth bears its own grid point and may be used as a guide.

To test the very idea, hatchlings- in harnesses, tied to a swivel arm, which was connected to a computer to monitor movement- were placed in a tank of water surrounded by a magnetic coil. It was observed that when the magnetic field of the coil was reversed, the turtles changed their direction. From such results, scientists believe it may demonstrate that the hatchlings ride the sea current to different beaches, relying on their natural compass to signal to them when to turn south into the Sargasso Sea, the feeding grounds where they will spend several years. The magnetic sense may also be used when swimming in open sea: turtles swim into waves but here, waves are found in all directions, which may cause some confusion to be sorted out, perhaps, but magnetic compasses within their brains.

It is also observed that young turtles orient themselves magnetically in accordance to the first light they see, suggesting they are drawn to the sea by light reflection on the surface of the water as soon as they emerge from the nests at night. To test, a light in the same tank as was mentioned previously was first shone from the east, to which the turtles responded by moving east. The light was then moved into the west direction, where the turtles also went towards the west.

However, the theory that migrating organisms are capable of employing the Earth’s magnetic field as a means of a navigation tool has existed for over one hundred years, where some scientists believe it to be questionable: they believe there is no concrete evidence which proves nor disproves the idea. It is believed that perhaps landmarks, polarized light, wave direction, and celestial cues may act as navigational tools where the magnetism does not play such an integral part, if any.

Species: Mammalia Monotremata Ornithorhynchidae Ornithorhynchus anatinus (Platypus)

Species distinctions: Platypus:
Weight: 0.5 to 2.0 kg ( 1.0 to 4.5 lbs)
Length (body + tail): 0.4 to .6 m ( 1.3 to 2.0 ft)
Gestation period: 15 days
Number of eggs: 2, which hatch within 10 days
Life-span: 15 years (natural death from old age)
Diet: worms (including earthworms), small crustaceans, mud
Distinctive qualities: shares anatomy and appearance of mammals and reptiles, showing more evidence of reptilian evolution; mammal which lays eggs; only truly known poisonous mammal; inhabits rivers and lakes of Australia only.
Physics Application: The platypus has been found to possess the ability to detect electromagnetism, which would possibly allow for navigation.

Species: Mammalia Montremata Tachyglossidae. Includes Tachyglossus aculeatus (Spiny Anteater or Echidna)
Species distinctions: Australian Spiny Anteater:
Weight: 2.5 to 6.0 kg (5.5 to 13.0 lbs)
Length (body + tail): 0.44 to 0.62 m ( 1.4 to 2.0 ft)
Incubation period: 8 to 10 days
Number of eggs: 1
Life-span: 50 years
Diet: ants, small insects
Distinctive qualities: a "hedgehog" covered with pencil-length, sharp quills; trumpet-like snout; extremely short legs; large claws; clumsy; tongue may protrude from mouth up to 20.0 cm (8.0 in) to get at ants; solitary; moves slowly; climbs trees with claws; burrows into earth when threatened but will also roll into a ball; lays eggs and therefore not a true mammal; may survive without food for a lengthy time
Physics Application: It is possible that the Spiny Anteater may use electromagnetism reception

Species: Salmo gairdneri (Rainbow Trout)
Physics Application: As is being investigated by the Experimental Biology Group of Auckland, New Zealand, it could be possible that the Rainbow trout may respond to the Earth’s magnetic field with a specialized magnetic sense organ and magnetic nerve. The nerves of the trout produce spikes (action potentials) at a steady rate when the magnetic field around them is not changed, where spike rates change if the magnetic field is changed. Information about the magnetic field is transmitted via single nerve branches found in the larger trigeminal nerve of the fish, where a few small branches enter the nose. There, the nerves appear to connect with unusual cells which may contain magnetite crystals. If it is so, they may support magnetic field detection.