An electronic device (100) for long-term adhesion to a mammal, the device comprising: a housing (102) forming a water tight enclosure； a rigid physiological data collection circuit (108) contained in the housing； a first wing (104) and a second wing (106) extending laterally from the housing without overlapping, in which each wing includes an articulated portion (194, 196) adjacent to the housing； a first electrode placed on the lower surface of the first wing and a second electrode placed on the lower surface of the second wing, the electrodes being electronically connected to the physiological data collection circuit (108)； an adhesive layer (164, 166) on the lower surfaces of the wings and not on a lower surface of the shell, in which the adhesive layer provides adhesion to the surface of the mammal, and in which the shell is not attached to the mammal when the electrodes are in contact with the mammal； characterized in that the device further comprises a first flap (154) connected to the first wing and a second flap (156) connected to the second wing, in which the flaps extend below the housing, but are not attached to the housing , which allows the housing to float on the wings when the electrodes are in contact with the mammal, in which the rigid physiological data collection circuit (108) extends over only a portion of the distance between the electrodes (124, 126).Un dispositivo electrónico (100) para adhesión a largo plazo a un mamífero, comprendiendo el dispositivo: una carcasa (102) que forma un recinto estanco al agua； un circuito rígido de recogida de datos fisiológicos (108) contenido en la carcasa； una primera ala (104) y una segunda ala (106) que se extienden lateralmente desde la carcasa sin solapamiento, en el que cada ala incluye una porción articulada (194, 196) adyacente a la carcasa； un primer electrodo colocado en la superficie inferior de la primera ala y un segundo electrodo colocado en la superficie inferior de la segunda ala, estando los e
