- I was bitten by a spider toay that was about 10mm in length and was an opaque yellowish colour with lots of eyes and on its abdomen had 4 small brown dots. It left a large lump and a red colour around it on the skin. The hospital couldn't identify the spider I took into them and was told to watch for any symptoms. I feel neasous and have a headache, all the swelling and redness has disappeared now no blood was drawn when I was bitten. Could this be a baby redback and how dangerouse are their bites. Thank-you.