A method for observing piglet birth, the method comprising - detecting, at a first plurality of detection zones arranged within a first two-dimensional array, infrared electromagnetic radiation within a wavelength interval between 7 μm and 15 μm from a first plurality of radiation zones, including detecting, at a first detection zone, infrared electromagnetic radiation from a first radiation zone, the first plurality of detection zones including the first detection zone and a second detection zone, the first plurality of radiation zones including the first radiation zone and a second radiation zone, the first plurality of radiation zones including a first plurality of areas of a first delivery zone of a first farrowing sow or gilt, the first plurality of areas of the first delivery zone including a first area of the first delivery zone and a second area of the first delivery zone, the first radiation zone including at least the first area of the first delivery zone, the second radiation zone including the second area of the first delivery zone, - obtaining, at the first two-dimensional array of detection zones, a first image of at least the first plurality of areas of the first delivery zone, the first image comprising a plurality of image elements, each image element having a value corresponding to a characteristic of the infrared electromagnetic radiation received within a first time range at a respective detection zone of the first two-dimensional array of detection zones, - identifying a first event indicative variation in the detected infrared electromagnetic radiation by means of the first image, the first event indicative variation being indicative of a piglet birth, identifying the first event indicative variation comprises identifying a first plurality of groups of image elements of the first image, and wherein the first plurality of groups of image elements includes a first primary group and a second primary group, the first primary group of image elements having one or more values or one or more derived values that differ at least by a first threshold value in relation to one or more values of or derived from the second primary group of image elements, and - determining a first piglet birth event by means of the identification of the first event indicative variation. - detecting, at a first plurality of detection zones arranged within a first two-dimensional array, infrared electromagnetic radiation within a wavelength interval between 7 μm and 15 μm from a first plurality of radiation zones, including detecting, at a first detection zone, infrared electromagnetic radiation from a first radiation zone, the first plurality of detection zones including the first detection zone and a second detection zone, the first plurality of radiation zones including the first radiation zone and a second radiation zone, the first plurality of radiation zones including a first plurality of areas of a first delivery zone of a first farrowing sow or gilt, the first plurality of areas of the first delivery zone including a first area of the first delivery zone and a second area of the first delivery zone, the first radiation zone including at least the first area of the first delivery zone, the second radiation zone including the second area of the first delivery zone, - obtaining, at the first two-dimensional array of detection zones, a first image of at least the first plurality of areas of the first delivery zone, the first image comprising a plurality of image elements, each image element having a value corresponding to a characteristic of the infrared electromagnetic radiation received within a first time range at a respective detection zone of the first two-dimensional array of detection zones, - identifying a first event indicative variation in the detected infrared electromagnetic radiation by means of the first image, the first event indicative variation being indicative of a piglet birth, identifying the first event indicative variation comprises identifying a first plurality of groups of image elements of the first image, and wherein the first plurality of groups of image elements includes a first primary group and a second primary group, the first primary group of image elements having one or more values or one or more derived values that differ at least by a first threshold value in relation to one or more values of or derived from the second primary group of image elements, and - determining a first piglet birth event by means of the identification of the first event indicative variation.