Hercules was challenged to kill the Nemean Lion. This was not easy because the lion's parents were supernatural, it was a monster, and its skin could not be pierced. Hercules blocked off the entrances to the cave and killed the lion with his bare hands. Hercules wore the lion skin as a cloak and the jaws as a helmet.
Labor 2: Hydra
Hercules had to find and kill the Hydra. If you cut off its head, two more would grow back. It had lethal footprint scent and breath. Hydra and another monster, Ally, almost had Hercules beat when his nephew, Iolaus, came to his rescue. Hercules cut off the heads and Iolaus sheered the neck to prevent regrowth. Hercules took the last mortal head and buried it deep beneath a rock.
Labor 3: Cerynitian Hind
Hercules had to capture the Cerynitian Hind or a fast, agile, beast of a female deer with golden horns. Hercules hunted the deer for an entire year until he finally saw it running on the banks of the River Ladon in Arcadia. Hercules pinned it down with an arrow by hitting between the tendons and bones of the two forelegs. He drew no blood.
Labor 4: Erymanthian Boar
In Arcadia, Hercules was challenged to bring Eurystheus an enormous wild boar, alive. He found the boar on Mount Erymanthus, and drove it in a snow bank so it could not move. He then carried it back to Eurystheus, on his back.
Labor 5: Augean Stabes
Hercules had to clean out the stables of King Augeas in a one day. Augeas had a lot of cattle and they left so much manure over the years that a gross scent fell over Peleponneus. Hercules made two rivers to let the manure flow out. He cleaned the stables without getting dirty.
Labor 6: Stymphalian Birds
Hercules had to hunt the Stymphalian Birds in a marsh by Lake Stymphalus near Arcadia. The birds eat human flesh, kill by shooting with their brass feathers, and cause annoyance with their number. Hercules could not approach the birds to fight because the ground was too mucky and swampy for his weight to walk through. So Hercules made noise with castanets to make the birds fly. He shot many down with his arrows.