This text explores Search and Rescue (SAR) dog work, examining the interplay of Umwelt, semiosis, and behavior in both dogs and humans. Drawing on Uexk & uuml;ll's notion of Umwelt, the discussion unfolds across two semiotic levels: endosemiosis, involving the constitution of species-specific Umwelten through non-mimetic processes, and exosemiosis, reflecting semiotic interactions within the established Umwelt. Emphasizing the Kantian influence on Uexk & uuml;ll, the text parallels the concept of transcendental schematism with monogram drafting, illustrating how organisms constitute their Umwelten. The exploration extends to Merleau-Ponty's interpretation of the monogram in Kant and the Umwelt in Uexk & uuml;ll, framing behavior as melodic and underscoring the reciprocal influence between an organism and its Umwelt. Shifting focus to SAR dog teams, the essay elucidates the melodic teamwork between human handlers and dogs. It discerns the convergence of distinct search tones-human-driven rescue tones and dog-driven reward tones-harmonizing in a dynamic inter-species melody. The melodic metaphor, inspired by Merleau-Ponty, illuminates the shared behavioral space where humans and dogs contribute tonalities to the melody of SAR searches. The exploration underscores the handler's role in facilitating this melodic collaboration, requiring interpretation deeply immersed in the movements of the dog, and a balance between guidance and trust in the dog's autonomy during the search.