An insect breeding device (100A, 100B, 100C, 100D) comprising at least one insect cage, the insect cage having a bottom floor, a first side wall, a second side wall, a third side wall, a fourth side wall opposite to first side wall and a top wall; a water supply unit (101a, 101b, 101c, 500) provided with: a reservoir for providing a liquid; a first pipe (102, 102b) connected to the reservoir for receiving the liquid from the reservoir, wherein the first pipe (102, 102b) is entering the at least one insect cage through a first opening in the at least one insect cage; a nozzle (106, 106A, 106B), coupled to the first pipe (102, 102b), positioned inside the at least one insect cage and configured to deliver the liquid to the interior of the at least one insect cage on at least one of the first side wall, the second side wall, the third side wall, the top wall and a portion of the bottom floor apart from a bottom floor portion, which bottom floor portion is located adjacent to the fourth side wall, wherein the fourth side wall of the at least one insect cage is provided with a cage access opening for receiving an ovisite, and an openable door covering said cage access opening and the ovisite, if present, when in closed position, wherein the ovisite is positioned above the bottom floor portion of the bottom floor of the at least one insect cage, such that during operation of the water supply unit (101a, 101b, 101c, 500) the ovisite is likewise as the bottom floor portion also outside the reach of water jets (a1, a2, a3, c, c') delivered by the nozzle (106, 106A, 106B). at least one insect cage, the insect cage having a bottom floor, a first side wall, a second side wall, a third side wall, a fourth side wall opposite to first side wall and a top wall; a water supply unit (101a, 101b, 101c, 500) provided with: a reservoir for providing a liquid; a first pipe (102, 102b) connected to the reservoir for receiving the liquid from the reservoir, wherein the first pipe (102, 102b) is entering the at least one insect cage through a first opening in the at least one insect cage; a nozzle (106, 106A, 106B), coupled to the first pipe (102, 102b), positioned inside the at least one insect cage and configured to deliver the liquid to the interior of the at least one insect cage on at least one of the first side wall, the second side wall, the third side wall, the top wall and a portion of the bottom floor apart from a bottom floor portion, which bottom floor portion is located adjacent to the fourth side wall, a reservoir for providing a liquid; a first pipe (102, 102b) connected to the reservoir for receiving the liquid from the reservoir, wherein the first pipe (102, 102b) is entering the at least one insect cage through a first opening in the at least one insect cage; a nozzle (106, 106A, 106B), coupled to the first pipe (102, 102b), positioned inside the at least one insect cage and configured to deliver the liquid to the interior of the at least one insect cage on at least one of the first side wall, the second side wall, the third side wall, the top wall and a portion of the bottom floor apart from a bottom floor portion, which bottom floor portion is located adjacent to the fourth side wall,