Possible Clues:

• Small amount
• Small amount, like a drop
• Small quantity came from lid Bert dislodged
• Tiny amount
• Get the bird up and allow it to have a drop or two
• What may be crane lifting permitted small quantity
• A drop of liquid
• Singer making a comeback allowed just a drop
• Only a little is needed to let the bird back
• Bunting possibly put up over obstruction in tiny stream