Question

How does a bat recognizes between its prey and any object placed in front of it ?

Answer 1

because pret absorbs some of the sound waves whereas if it strike to a hard object such as tree the whole soundwaves r bounced back

Answer 2

I remember an interview with Neil DeGrasse Tyson and Richard Dawkins on some show in America but they were suggesting that it could be possible for ultrasound to be translated into colours by the brain - almost like seeing in colour. Potentially then different organisms could be assigned different colours. However that is a guess from something I heard. I am no bat expert and have not looked for any other evidence. I just thought it was interesting at the time, so I remembered it. Hopefully you are able to find something of value .