Most humans, being species-centric, believe that we are the only animals capable of crying. (We also used to believe we're the only creatures who make tools, but that's been disproven for some time. But that's the subject of another blog, sometime, somewhere).
Many beings cry when facing death.
Many beings cry when dealing with loss.
There's so much sorrow in the world, but tears aren't just about sadness.
Many beings cry with joy when attaining freedom:
And they cry when reunited with a loved one: