Two of a kind the Monarch Butterfly and its beautiful host plant Milkweed. It is well understood that loss Milkweed results in decreased numbers of Monarch Butterflies. A recent study by Bret Elderd and Matthew Faldyn from Louisiana State University suggest climate change can alter the chemical composition of Milkweed making it poisonous to Monarchs. Climate change, habitat loss and other human activities. Sometimes I wonder when the tipping point will come, if it has no already. Not just for Monarchs but for all life on earth.
For more Monarch Butterfly research articles I might suggest science daily.