ID a bird egg i found?

My nephew found a little birds egg. no nest near by and theres a lot of kids in the area that could possibly trample it if left where it was (middle of there front yard) so i took it home. i'm no bird expert. i like cats! but i know that you need to keep it warm.
he found it friday night and i've been keeping it warm sense then (today is tuesday) yesterday i noticed something in the egg when i back lit it. (using my phone flash light) this morning when i checked again you can see little bit of veins and what i think is the heart beating!
even though i was keeping it warm i just assumed it was dead but didn't have the heart to toss it until i was sure. now i have a growing egg and i'm not kidding myself, i know i can take care of a baby bird.
i emailed a bird place for help. but til then i wanna know what kinda bird it is. i'll attach a link for the photo. its all white.
http://desolatekitten.tumblr.com/image/48716631797

2013-04-24T11:21:40Z

i meant, *i CANT take care of a baby bird* whoops

?2013-04-23T13:59:45Z

Favorite Answer

Hard to tell from pic, but looks a lot like my dove's eggs when they lay them. Could be a Mourning Dove egg.

Greywolf2013-04-23T23:39:31Z

PUT IT BACK by holding it you are literally breaking the law, it is illegal to hold bird eggs, feathers, nests etc.