Lista de Especies de Galápagos

Geospiza fortis Gould, 1837

Pinzón mediano de tierra, Medium Ground Finch

Pinzón Mediano de Tierra en Floreana, Galápagos. Foto: Michael Dvorak, CDF.
Pinzón Mediano de Tierra en Floreana, Galápagos. Foto: Michael Dvorak, CDF.

En Santa Cruz, existen aves con picos pequeños y otros de pico grande que se pueden confundir con el pinzón grande de tierra. Sin embargo, los pinzones medianos de tierra tienen el pico menos alto y la impresión general al observar su pico no es tan masiva como al observar un pinzón grande de tierra.

Amenazas Las principales amenazas probablemente son las ratas y enfermedades, se conoce que se encuentra afectado por la mosca parásita Philornis downsi que causa una alta mortalidad de pichones. Infomación adicional Venegas, L.

Taxonomía

Dominio
Eukaryota

Reino
Animalia

Filo
Chordata

Clase
Aves

Orden
Passeriformes

Familia
Thraupidae

Género
Geospiza

Especie
fortis

Categoría de taxón: Aceptado

Syn: Geospiza dubia (Gould, 1837); Geospiza dentirostris (Gould, 1837).

Estado

Categoría en la Lista Roja de la UICN: Preocupación menor

Preocupación menor

Ecología

Tipo de alimentación: Granívoro

semillas y flores

Preferencias de alimentación: Se alimenta principalmente de semillas pero también de flores, puede ser un vector importante de la dispersión de polen.

Papel trófico: Herbívoro

Modalidad de reproducción: Exclusivamente sexual

Biología reproductiva: El macho se exhibe en frente de un nido en forma de domo, frecuentemente construido en una Opuntia. Solo la hembra incuba 3-5 huevos, pero ambos alimentan los pichones.

Distribución

Mapa de distribución de las localidades de colección o registros de observación para esta especie en nuestra base de datos de colecciones.

Distribución: En todas las islas mayores excepto Darwin, Genovesa, y Wolf (donde uno fue colectado en 1906). Entre 1905-1906, quince juveniles fueron colectados en Española, tal vez parte de una población ahora extinta.

Referencias

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