Here's the magpie robin sitting on the champa tree outside of my dining room. If you click here. you'll get to see him having his drink of water and bath, all the time whistling sweetly. I think it's mating time for them. That's when he sings the sweetest song.
"Birds on the tree tops sing their song, They fill the air with music all day long. Each flower in the garden sings it too; So why shouldn't I, why shouldn't you Praise Him too!"