Yesterday I let a stray cat sleep on a chair on my balcony. After it got up, I saw it left dozens of blood filled parasites on the chair, but I'm not sure of which kind.
They are tiny (1-2mm diameter), very slow moving, some are black and some red-ish from blood, they pop easily and leave a bloody splatter, it's hard to see their legs, but they have small antennas.
I'm attaching a photo, but it's not great, as they are too small to easily photograph.
Can you identify it? Does it transfer to humans? What should I do?