<?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>S1870-74592023000100201</article-id>
<article-id pub-id-type="doi">10.28947/hrmo.2023.24.1.669</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hallazgo inédito de carboneros cresta negra (Baeolophus atricristatus) con picos deformes]]></article-title>
<article-title xml:lang="en"><![CDATA[Beak deformity in Black-crested Titmouse (Baeolophus atricristatus)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tinajero]]></surname>
<given-names><![CDATA[Romeo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Instituto de Investigación de Zonas Desérticas ]]></institution>
<addr-line><![CDATA[San Luis Potosí San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>24</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-74592023000100201&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-74592023000100201&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-74592023000100201&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. Las deformidades en picos de aves son raras, aunque sí se han registrado en diferentes partes del mundo, principalmente en Norteamérica y en Europa. Se presenta el registro de tres individuos de carbonero cresta negra (Baeolophus atricristatus) con pico anormal, registrados el 26 de mayo de 2018, en la localidad Ranchito de Juárez, municipio de Zaragoza, San Luis Potosí, México. Las aves fueron observadas al acudir a un comedero rústico de forma frecuente. La mandíbula superior del pico (rinoteca) de los individuos presentó una prolongación anormal cruzada a la mandíbula inferior del pico. Los registros son novedosos y representan los primeros casos conocidos del trastorno de queratina aviar en la especie.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. Beak deformities are rare, although they have been documented in different parts of the world, mainly in North America and Europe. I present records of three individuals of Black-crested Titmouse (Baeolophus atricristatus) with beak deformities, registered on 26 May 2018, in the Ranchito de Juárez locality, municipality of Zaragoza, San Luis Potosí, Mexico. The birds were observed when they attended a rustic feeder. The upper mandible of their beaks (maxilla or rhinotheca) had an abnormal prolongation, crossing the lower mandible of the beak. These records are novel and represent the first known cases of avian keratin disorder in the species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[anormalidad en pico]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[Paridae]]></kwd>
<kwd lng="es"><![CDATA[trastorno de queratina aviar]]></kwd>
<kwd lng="en"><![CDATA[beak deformities]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[Paridae]]></kwd>
<kwd lng="en"><![CDATA[avian keratin disorder]]></kwd>
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