cardinal eggs

Im asking if anyone know what they look like because my sister and i found a nest with 3 brown speckled eggs and a saw a bird with a red tail and was wondering if it was a cardinals.

here's a link for you to cut and paste to check it out:

http://www.conservation.state.mo.us/nathis/birds/birdatlas/maintext/0400021.htm

Thanks alot grannylois!