State of the Birds 2017 is an effort to predict the possible future of selected Massachusetts bird species. In many respects climate (i.e., temperature and precipitation) controls or determines the range of bird distribution, and birds and people alike are already feeling the impact and effects of a rapidly changing climate. Using a scientific process called “climate envelope modeling,” Mass Audubon evaluated and projected the possible future distribution of 143 breeding Massachusetts birds in 2050. The results of the climate envelope modeling revealed that of the 143 breeding birds analyzed, 43% are “highly vulnerable” to climate change, 15% are “likely vulnerable”, and 42% are “least vulnerable.” Forest birds, coastal birds, and long-distance migratory birds are groups that appear to be particularly vulnerable. The results of State of the Birds 2017 will help Mass Audubon and other organizations and individuals set up on-the-ground advocacy, land conservation, science, and education programs that will help Massachusetts birds cope with a warming climate in the future. The future that State of the Birds 2017 describes is but one possible future. With this information, the actions of individuals, the conservation community, and state and federal governments today will be able to change this future for birds. Download and read the full report online at massaudubon.org/sotb . Look for further explorations from Mass Audubon’s science team over the next year.