Willow ptarmigan complicated changes in plumage several times a year and the differing colour and pattern of the summer plumage: The willow ptarmigan often hybridises with the black grouse ("Tetrao tetrix") and the hazel grouse ("Tetrastes bonasia") and occasionally with the western capercaillie ("Tetrao urogallus"), the spruce grouse ("Falcipennis canadensis") and the rock ptarmigan ("Lagopus muta"). During the Pleistocene, the willow ptarmigan widely occurred in continental Europe. Authors who recognize paleosubspecies have named the Pleistocene willow ptarmigan "L. l. noaillensis" (though the older name "medius" might be the correct one). These marginally different birds are said to have gradually changed from the
Winter Mountain and shortly afterwards, signed to Dillon and Lakemans fledgling label 'Charcoal Records'. Their debut album 'Winter Mountain', produced by Sam Lakeman and recorded at multiple vintage studios throughout the UK including Rockfields and State of the ark, was released in 2013 to much acclaim. Soon after the release Winter Mountain signed to Faber Music Publishing. Smyth left Winter Mountain in 2015. In the year that followed Francis travelled Ireland, The UK and France. Whilst on the road he wrote and demoed the songs that were to form Winter Mountains second album 'I Swear I Flew'. Upon his return to Cornwall