Since 2003, The American Naturalist has published several papers each month as e-articles, providing color typesetting at no extra charge. These papers are, in all other respects, identical to papers published in print: they appear in the print and online table of contents (with page numbers beginning with an "E," e.g., pp. E7-E13), they are indexed by Medline and the other abstracting services that index the journal, and they can be downloaded as a typeset PDF file, the appearance of which is indistinguishable from PDFs of printed papers. The choice of appearing as an e-article is available to all authors, though the number that can appear with each issue are limited.