Where do animals release most nitrogen from there body?

Animals primarily release nitrogen from their bodies through urine, where it is excreted in the form of urea, uric acid, or ammonia, depending on the species. In mammals, urea is the main nitrogenous waste product, while birds and reptiles often excrete uric acid to conserve water. Additionally, some nitrogen can be released through feces and, to a lesser extent, through respiration. This excretion process plays a crucial role in the nitrogen cycle and helps maintain nitrogen balance in ecosystems.