The poisoning incident in Guinea-Bissau represents a loss of around 5% of the estimated national population of Hooded Vultures, which makes up 22% of the entire global population.
Even when birds are not flying in a flock, they may observe each other to sense the world around them.
Well-intended efforts to reduce food waste could threaten some birds and animal species, a new paper has warned.
They might keep the environment clean and healthy but most species are in steep decline.
Wind farms are responsible for a large number of bird deaths. Finding a way to ensure that they can co-exist is vital.