Animal echolocation extremely narrow beams and many receivers to localize a target (multibeam sonar), animal echolocation has only one transmitter and two receivers (the ears) positioned slightly apart. The echoes returning to the ears arrive at different times and at different loudness levels, depending on the position of the object generating the echoes. The time and loudness differences are used by the animals to perceive distance and direction. With echolocation, the bat or other animal can see not only where it is going but also how big another animal is, what kind of animal it is, and other features.. At the most
Downer (animal) American cows in 2003. Many experts believe that nonambulatory cattle are at higher risk of harboring BSE. As a result, on December 30, 2003 the USDA announced an immediate ban on the slaughter of downer cattle for human food use. At issue is how to monitor the hundreds of thousands of U.S. downer cattle (annual estimate) if they are no longer presented for observation and testing at meat packing plants; also at issue is what to do with their remains, and whether they have any non-food value. Downer (animal) A downer is an animal, usually livestock, that cannot stand on