It always makes me feel better when I have the winter blues

They have “cooped up” fever, but they know they are in an office. When you played nature sounds while they felt stuck, you introduced a feeling of ‘wrongness’ to the feeling of being trapped.
OR they were very happy whining and didn’t want any solutions because they were whine-bonding. That happens in offices, too.

Sounds like someone has a case of the Mondays.

That depends on what kind of birds you were playing - crows and vultures tend to have this effect on people