The birds were making loud gargling like noises outside the front door! That's always a sign of danger.
Can you spot the two 
Carbon Is Life Book
The story of carbon dioxide, the essential life-giving gas that feeds all life. Contrary to everything we have been told, our planet is currently suffering a carbon famine, with deadly consequences for the poor and for wildlife.
This is the book every environmentalist and lover of wildlife really needs to read! (Click on the image to find out more.)
