If you’re planning a development and there’s a chance of bat activity on your site, a Bat Emergence Survey could be a crucial part of your planning application. These bat surveys are a legal requirement in many cases; understanding how they work and why they matter will help you move forward with your scheme confidently. What Is a Bat Emergence Survey? A Bat Emergence Survey, also known as a Bat Emergence and Re-entry Survey (BERS), is a detailed ecological assessment carried out at dusk ...