Chris Skinner and Matthew Gudgin begin by watching a charm of goldfinches busy feeding on their favourite food.They head to a different part of the farm to watch the latest colony occupying a hole in a sweet chestnut tree. Chris describes the various species that trees can support throughout their lives.Chris quietly admits to Matthew a plant that has appeared in his wild bird winter seed mix that's grown in error at High Ash Farm.They get excited as they talk about a moth species that has be...