Apparatus 101 for monitoring an equine animal 1001 comprises a casing (102 Fig 1) located at the poll 1002 of the head 1003 of the equine animal. The casing houses a monitoring unit (501 Fig 5), which comprises a sensor arrangement (1103 Fig 11), a data processor (1101 Fig 11) with access to data storage and for processing received sensor signals to identify acquired data representative of a behavior definition, a communication interface (1104 Fig 11) and a power source (1106 Fig 11). The monitoring unit may be configured to store data over a period of time allowing the time and duration of each behavior definition to be determined. The sensor arrangement comprises a tri-axial accelerometer (1107 Fig 11) for detecting motion and a global positioning system (GPS) receiver (1108 Fig 11) for detecting location. The data processor is configured to sample the tri-axial accelerometer at a sampling rate in the range 8Hz to 25Hz inclusive, preferably 12Hz to 13Hz inclusive. A method of monitoring the behavior of an animal using said apparatus is also claimed.
