Nido literally translates to "nest". While it's a common word, its use in this song is particularly poignant and evocative.
In the lyrics, the singer refers to their home with his beloved as "nuestro nido" (our nest). This metaphor beautifully conveys a sense of intimacy, warmth, and shared sanctuary, highlighting the deep connection and comfort they once had together before she left.
This song, "Porque Se Habra Ido" by La Zenda Norteña, is a really direct and a little bit heartbroken look at a man who's been left by someone he thought was completely his. He's confused and maybe a little angry, asking why she left when he felt like she had everything with him. He sings, "y no porque sea marido si ya era mía" (and not because I'm her husband, but she was already mine), which is a pretty bold statement about possession. He talks about their "nido" (nest) and how she had her own bed and never went hungry, always having "cosas bonitas" (nice things).
He's clearly still reeling from the breakup, asking everyone he sees, "si la vez por ahí fuentes que dieron que llores por ella sin consolación" (if you see her out there, tell her to cry for him without consolation). He's imagining her missing him, remembering him under the parasol. It's a mix of sadness and a bit of a plea for her to feel the same pain he does. He keeps repeating the question, "porque ese amarillo día era mía" (why that yellow day she was mine), still trying to understand why she left when he felt so secure in their relationship.