jueves, 8 de noviembre de 2007

Anillamiento didáctico de Aves

La mañana del 12 de octubre la dedicamos a realizar un anillamiento didáctico de aves, en la cual Fernando Díez nos mostró en qué consiste el anillamiento científico de aves, el método de captura de las aves y todo el proceso de anillamiento.

El día se presentaba bien, pues ni el viento ni la niebla hicieron acto de presencia. Ayudamos a Fernando y a Inma a montar dos redes japonesas de 12 metros, situadas en la margen derecha del Canal de Castilla, en torno a la Exclusa nº7 y al cruce del Canal con el Sequillo, entre los espinos de la ribera. La puntualidad fue total y a las 9 de la mañana ya estaba todo el equipo montado y comenzamos a anillar las aves que fueron cayendo.

Poquito a poco fueron cayendo pajarillos que recogíamos cada 45 minutos aproximadamente. Anillamos 5 especies distintas:

Curruca capirotada
Carbonero común
Petirrojo
Mosquitero común
Chochín

Eso sí, el frío mañanero no perdona y tuvimos que entrar en calor un poquito de chocolate y abisinios!

Ninguna de las especies capturadas estaba previamente anillada. Fernando tiene los datos de las especies por si tiene que aclarar algo (sobretodo el número de animales anillados) o si me he dejado laguna especie por nombrar.


Cuando Fernando anillaba a cada ave nos iba comentando el método que se sigue en el anillamiento científico. Entre otras cosas la determinación de la especie, fácil en la mayoría de las veces y con mayor complicación en algunos casos como los mosquiteros. Además aprendimos como se toman las medidas de las plumas primarias de alas, medidas del tarso, como se mide la cantidad de grasas, el tono muscular o el peso, o algunos datos por los que se puede saber si el animal es macho o hembra en las especies que no presentan dimorfismo sexual. Por último el animal es anillado. Todas las medidas y el número de anilla se apuntan en un registro que lleva cada anillador y que periódicamente envía a una base de datos central del Ministerio de Medio Ambiente. De esta forma, si ese ave vuelve a ser capturada se podrá saber de donde ha venido y sus características anteriores.

A parte de las especies anilladas también pudimos ver lúganos, carboneros y herrerilos, y en el mirador de las Lagunas de Tamariz observamos un zarapito en vuelo, que por las medidas y el color más claro, probablemente fuera un zarapito trinador.

La mañana fue excepcional y aprendimos un montón de cosas sobre el anillamiento y las especies anilladas. He colgado también algunas fotos de la actividad. Gracias a Javier por pasarme los dos superretratos y por supuesto a Fernando por la realización de la actividad de forma tan divertida e interesante. Os animo a los asistentes a que comentéis que os pareció la actividad o a completar el relato, que seguro que me he dejado bastantes cosas en el tintero.


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