The Atol holder, based in Leeds, specialised in organising birdwatching trips around the world for 30 years but had already been forced to cancel its autumn tours because of Covid-19 restrictions.
Bird Holidays director Paul Willoughby wrote in a message to customers: “It is with a heavy heart that I am announcing that Bird Holidays has stopped trading.
“Since the pandemic was declared in March 2020, it has been impossible for us to safely operate a single tour and it has been heartbreaking to watch a thriving business, popular with customers and guides alike, deteriorate to the extent that it has.