How does an animal detect changes in it's environment?

Answer 1

It is not entirely known how animals can detect some events before they happen. Like earthquakes and tsunami's. Some say they can hear subsonic frequencies that are put out by earthquakes and other seismic activity that we cannot hear. Other theories are changes in air pressure that they somehow notice.
One thing is for sure though, they definitely can tell before we can.

Answer 2

Very interesting question. Animals detect changes in the environment by vibrations, hearing, seeing, sense of smell, amount of sunlight and the Earth's magnetic forces (Moon and tides). Ever noticed a dog sniffing the air or the ground? Have 14 dogs. The little Chihuahuas go crazy sniffing out creatures who passed through the yard the past evening-when we take them out to potty in the morning. Owners are saved from house fires because cats/dogs smell the smoke. Animals have a 6th sense too. Have a dog who can detect a certain negative behavior in men. Dog is 100% accurate. Not trained to detect the trait. No one living in our home has the trait. We've had the dog since a pup. Scientists think animals can detect minute vibrations that occur before a major Earthquake. The majority of animals mate according to the amount of hours of sunlight in the day. Animals also start migrations for the same reason. Sea animals like corals, spawn only during a full Moon during a specific month.

Answer 3

he's place has been changed or it's occupied; his links to outside are closed or he is not having the usual meal timetable. usually pets are sensible to this type of changes. this determines their attitude and they become, anxious or try to escape from the new environment.. sometimes the change can be caused by having another animal around him, like a new pet, for example.