Not a very good image but this is my rooster.
He's nice, especially when there are no hens are present, he's a bit protective over the hens. He's not willing to attack me but gets very upset if he thinks the hens are in danger.
I'm fairly sure it's a pullet. Too soon to judge, though. Also, protective traits wouldn't show in small cockerels. Mine took about 6 months, a while after getting large combs and wattles, before he finally accepted he was going to have to take care of the hens.
Actually, some breeds are like that. But most breeds, specifically single combs aren't like that. For Black Australorps, they should have a clearly visible comb on cockerels at 4 weeks, and pullets at 6 weeks.
Sorry for your loss!
Free range is cool, and definitely is cheaper then buying all that chicken wire for the run, but in places where coyotes, and other animals of that sort live, it's not a "excellent" option.