As a rating for a bird movie I give it a 3/5. 'Bird box' as named in the title is a actually a subtle but prominent feature to the film. It is not a documentary or film all about birds and birds do not have the main focus of the film. However it is a film where you will find yourself wondering how are the birds?
In the film birds are seen as friends, the first birds we see are three beautiful colourful bright blue birds. They are budgies or parakeets. the nicknames given for a budgerigar. This is a teeny birds that have made themselves popular around the world due to their size, low maintenance and ability to mimic peoples speech. In the Bird Box film their popularity is more so down to their ability to sense danger around them something humans in the film are unable to do. Therefore helping as an indicator for the mysterious force.
It seems in some scenes the birds appear to be real life birds and in later scenes CGI. Bird Box released via Netflix also released a short video of an amusing array of bird responses to the Bird Box film which is also worth a watch.