guys i have a small farm and i want to make an animal sensor that could senes the present of animal in the farm but i dont know what to do exactly ?? any suggestion please
how to make it
iam thinking about the infrared sensor
Hello wiwiw
Check a PIR motion detector fits to your unknown system requirements.
Have a nice day and enjoy coding in C++.
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Its possible the size of these unknown animals will affect how you sense them.
Shrews are pretty small I beleive.
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yes ,but i have somehow a problem with the big ones like wild pigs and wolves and camel too
i dont know haow i can protect my farm cuz they destroying everything ,
and here there is no shrews by the way ??
i have an idea , to put PIR motion detector with an gps and when it sense the presence of this animal it trigger the alarm and send me the location of the animal what do u think ?
It was meant a hint for you to provide some more information on your setup and what you want to protect.
Another hint;
A small farm in Australia is likely to be many times bigger than a small farm in the UK.
Puzzled I am.
If you have an PIR motion detector in place, why do you need a GPS to tell you where it is ?
cuz if with the alarm these animal didnt go away ,i can locate them , and send the localtion to the police to help me , or send my dogs hhh 
am juste thinking u know 
The PIR sensor doesn't move... the animals move. So unless you put the GPS tracker on the animals (which might be difficult) I don't think this idea will work.
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A Grid of PIR sensors with each sensor giving a unique location point on the grid could work.
I use an Infared camera to detect animals and I am able to differentiate between small, medium, and large sized animals, as defined by my programming.
My Infared camera takes an image, down sizes the image and sends the image to a Raspberry Pi, where I use a Machine Learning algorithm, Nearest Known Neighbour, to detect the presence of an animal and it's size.
Good luck.
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but how can i sized the animals
do u have an programme for that ???
right the animals are moving i can't really locate them
I use a trained Nearest Known Neighbour model and a KNN algorithm to determine animal size.
I have a program for that along with trained models.
can u send me this programme *
nd thankkks
I could but I am not going to give you 100's of hours of my research and work that it took to create trained KNN models and write a KNN program in Python that detects animals and classifies them that runs on a Raspberry Pi.
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Surley all you need to do is have each animal collect an appropriatly sized GPS tracker when they enter the farm ?
I mean cows are persuaded to use automatic milking machines, so getting animals to pick up a GPS ought not to be so difficult.
A double electric fence stopped the animals from getting to our garden and flowers. Will work for you, also. Two fences, 30 inches apart. Electrify the lower 1/2 of each fence and add very visible strands to make the animal think there is electric wires higher than they can jump.
If these unwanted animals are crossing your fences, I would use a knock sensor or tap sensor or ball switch to "listen" for fence shaking, then another subsystem alerts you.
https://www.circuitbasics.com/how-to-setup-vibration-sensors-on-the-arduino/
for my farm i haven't a fence so i don't know if this idea gonna work
can u give me name of an infared camera that i can use ?
how much space can an infrared sensor cover.
in meter??