<?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>S1870-74592025000100202</article-id>
<article-id pub-id-type="doi">10.28947/hrmo.2025.26.1.781</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Malformación del pico en un cardenal norteño (Cardinalis cardinalis)]]></article-title>
<article-title xml:lang="en"><![CDATA[Beak malformation in a Northern Cardinal (Cardinalis cardinalis)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Lara]]></surname>
<given-names><![CDATA[Zulema Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Moreno]]></surname>
<given-names><![CDATA[Vannia del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Niño-Maldonado]]></surname>
<given-names><![CDATA[Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Facultad de Ingeniería y Ciencias ]]></institution>
<addr-line><![CDATA[Ciudad Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Ciudad Victoria  ]]></institution>
<addr-line><![CDATA[Ciudad Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-74592025000100202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-74592025000100202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-74592025000100202&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las malformaciones en aves silvestres son poco frecuentes y los avistamientos son raros y poco estudiados. En Ciudad Victoria, Tamaulipas, México, documentamos un ejemplar de cardenal norteño (Cardinalis cardinalis) que presentó una marcada malformación en la mandíbula superior del pico. Para obtener datos morfológicos e identificar más ejemplares con malformaciones, realizamos muestreos mediante redes de niebla, acumulando un esfuerzo de 32 horas-red. Capturamos 19 individuos, a los cuales se les tomaron medidas del pico (superior e inferior), la longitud total del cuerpo y el peso. Los resultados revelaron que el ejemplar con malformación presentó un peso y una longitud total menores en comparación con los ejemplares con pico normal. Esto sugiere que la malformación en su pico afectó su desarrollo, probablemente debido a dificultades para realizar actividades de alimentación. Este estudio destaca la importancia de recopilar información sobre malformaciones en aves silvestres para identificar sus posibles causas y comprender mejor las implicaciones ecológicas y evolutivas de estos eventos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Malformations in wild birds are uncommon, and sightings are rare and understudied. In Ciudad Victoria, Tamaulipas, Mexico, we documented a Northern Cardinal (Cardinalis cardinalis) with a marked malformation in the upper mandible of its beak. To obtain morphological data and identify additional individuals with malformations, we conducted mist-net sampling, accumulating 32 net-hours of effort. We captured 19 individuals and took measurements of their beaks (upper and lower), total body length, and weight. The results revealed that the individual with the malformation had a lower weight and shorter total body length compared to individuals with normal beaks. This suggests that the beak malformation affected its development, likely due to difficulties performing feeding activities. This highlights the importance of gathering information on malformations in wild birds to identify their possible causes and better understand the ecological and evolutionary implications of these occurrences.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cardinalidae]]></kwd>
<kwd lng="es"><![CDATA[deformidad]]></kwd>
<kwd lng="es"><![CDATA[morfología]]></kwd>
<kwd lng="es"><![CDATA[patología]]></kwd>
<kwd lng="en"><![CDATA[Cardinalidae]]></kwd>
<kwd lng="en"><![CDATA[deformity]]></kwd>
<kwd lng="en"><![CDATA[morphology]]></kwd>
<kwd lng="en"><![CDATA[pathology]]></kwd>
</kwd-group>
</article-meta>
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