<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-7459</journal-id>
<journal-title><![CDATA[Huitzil]]></journal-title>
<abbrev-journal-title><![CDATA[Huitzil]]></abbrev-journal-title>
<issn>1870-7459</issn>
<publisher>
<publisher-name><![CDATA[Sociedad para el Estudio y Conservación de las Aves en México, A.C. (CIPAMEX)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-74592025000200102</article-id>
<article-id pub-id-type="doi">10.28947/hrmo.2025.26.2.822</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[What we know about the breeding biology of the endemic Gray-barred Wren (Campylorhynchus megalopterus)]]></article-title>
<article-title xml:lang="es"><![CDATA[Lo que sabemos sobre la biología reproductiva del endémico Matraca barrada (Campylorhynchus megalopterus)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marcuk]]></surname>
<given-names><![CDATA[Vladislav]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Leibniz Institute for Zoo and Wildlife Research  ]]></institution>
<addr-line><![CDATA[Berlin ]]></addr-line>
<country>Germany</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-74592025000200102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-74592025000200102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-74592025000200102&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The Gray-barred Wren (Campylorhynchus megalopterus) remains among the most poorly known representatives of the family Troglodytidae endemic to Mexico. Little information exists on the species&#8217; ecology and breeding biology, with only two known egg records in museum collections. Here I synthesized data from the literature and obtained 14 photographic records from citizen science databases to enhance our understanding of breeding behavior, egg morphology, and nesting habits of the Gray-barred Wren. I also critically assessed two egg collections in museum records. Only two, decades-old studies provided data on Gray-barred Wren breeding parameters, which I compared with information on 7 endemic wren species. According to the review, the Gray-barred Wren has an extended 10-month breeding season from November to August. The globular nest, cream-white egg interspersed with magenta to brownish spots, and evidence of cooperative breeding, were similar to closely-related species. However, the Gray-barred Wren had a smaller clutch size (1-3 eggs) and larger eggs (26.87 × 19.43 mm) than other endemic wren species. Notably, my critical reassessment of an egg set in the Western Foundation of Vertebrate Zoology collection that is attributed to the Gray-barred Wren, determined discrepancies in egg morphology, collection location, and associated nest description, suggesting a misidentification and incorrect species allocation. These findings highlight the importance of citizen science and museum records in uncovering essential biological data for poorly-known taxa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La Matraca Barrada (Campylorhynchus megalopterus) sigue siendo uno de los miembros menos conocidos de la familia Troglodytidae endémico de México. Existe poca información sobre la ecología y la biología reproductiva de la especie, y solo se conocen dos registros de huevos en colecciones de museos. Aquí, sinteticé datos de la literatura, y obtuve 14 registros fotográficos de bases de datos de ciencia ciudadana para mejorar nuestra comprensión sobre el comportamiento reproductivo, la morfología de los huevos y los hábitos de anidación de C. megalopterus. También evalué críticamente dos colecciones de huevos en registros de museos. Sólo dos estudios realizados hace décadas proporcionaron datos sobre los parámetros reproductivos de C. megalopterus, que comparé con información de 7 especies endémicas. De acuerdo con la revisión, C. megalopterus tiene una temporada reproductiva extendida de 10 meses, desde noviembre a agosto. El nido globular, el huevo blanco crema intercalada con manchas magenta a marrones, y la evidencia de reproducción cooperativa, eran similares a especies estrechamente relacionadas. Sin embargo, C. megalopterus tuvo un tamaño de puesta más pequeña (1-3 huevos) y huevos más grandes (26.87 × 19.43 mm) que otras especies endémicas de Troglodytidae. Notablemente, mi reevaluación crítica de un conjunto de huevos en la colección del Western Foundation of Vertebrate Zoology, atribuida a C. megalopterus, determinó discrepancias en la morfología de los huevos, el sitio de colecta, y la descripción del nido, sugiriendo una identificación errónea y una asignación incorrecta de la especie. Estos hallazgos destacan la importancia de la ciencia ciudadana y los registros de museos para descubrir datos biológicos esenciales de especies poco conocidas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Citizen science]]></kwd>
<kwd lng="en"><![CDATA[eBird]]></kwd>
<kwd lng="en"><![CDATA[egg collections]]></kwd>
<kwd lng="en"><![CDATA[Gray-barred Wren]]></kwd>
<kwd lng="en"><![CDATA[nesting]]></kwd>
<kwd lng="en"><![CDATA[Troglodytidae]]></kwd>
<kwd lng="es"><![CDATA[anidación]]></kwd>
<kwd lng="es"><![CDATA[ciencia ciudadana]]></kwd>
<kwd lng="es"><![CDATA[colecciones de huevos]]></kwd>
<kwd lng="es"><![CDATA[eBird]]></kwd>
<kwd lng="es"><![CDATA[Matraca Barrada]]></kwd>
<kwd lng="es"><![CDATA[Troglodytidae]]></kwd>
</kwd-group>
</article-meta>
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