Unlike an adult mature Black Oystercatcher (Haematopus bachmani), the Juvenile has black on the beak which will turn red as it matures,  and the eyes are a dull brown color which will turn a bright yellow when it matures.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/32541690@N02">Alan Vernon</a>
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/32541690@N02/4060631651/">Juvenile American Black Oystercatcher #3</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Berichard" title="User:Berichard">berichard</a></li></ul>