Heu sentit mai les ratapinyades? Vàrem conèixer i escoltar les ratapinyades de s’Albufera i de s’Albufereta

Les ratapinyades són uns dels
mamífers més desconeguts de les nostres illes. 
Per conèixer-les millor, a l’octubre passat s’organitzaren dues visites
guiades nocturnes, una a s’Albufera i l’altra a s’Albufereta. Vàrem aprendre
molt de la biologia d’aquests animals i poguérem escoltar, amb els aparells necessaris, els ultrasons que emeten mentre
cacen de nit en aquestes zones humides del nord de Mallorca.
En ambdues
activitats ens acompanyà David García, expert en quiròpters i membre de la SECEMU. Ens va explicar
algunes generalitats sobre les ratapinyades, quines espècies es troben a les
Illes Balears i quines són presents a s’Albufera i a s’Albufereta.

Explicacions al començament de l’activitat al grup de s’Albufera.

Mentre esperàvem que es fes fosc aprofitàrem per observar ocells a la platja de la reserva natural de s’Albufereta

Explicacions generals de les ratapinyades devora la mar a la Reserva de s’Albufereta

 Abans de començar l’itinerari per la Reserva natural de s’Albufereta
Totes les espècies s’alimenten
d’insectes, llevat d’una, que pesca peixos petits volant arran de l’aigua dels
canals. Les zones humides són, per tant, llocs importantíssims per a
l’alimentació de les ratapinyades, gràcies a la seva elevada productivitat en
insectes. De fet, colònies tan llunyanes com les d’algunes coves d’Inca hi
acudeixen a alimentar-se.  
Els quiròpters utilitzen
l’ecolocació per desplaçar-se en la foscor i per caçar al vol.  David va dir que, utilitzant aparells que
capten els ultrasons, es poden arribar a identificar les diferents espècies, ja
que cadascuna emet els ultrasons a una freqüència concreta, i va anunciar que a
continuació els utilitzaríem per a sentir les ratapinyades mentre volen i
cacen. Tot seguit, en David va repartir als participants quatre aparells
d’ultrasons i va començar un recorregut
cap a diferents indrets dels espais naturals. Només es pogueren detectar algunes
espècies,  per mor de que per aquest
temps les ratapinyades comencen a hivernar.

A les mans del ponent podeu veure l’aparell d’ultrasons
David també va explicar que
s’ha demostrat que els quiròpters són molt bons indicadors de la salut dels
ecosistemes. En cas de canvis en la qualitat de les aigües, les ratapinyades
són dels primers grups d’organismes en notar-ho.
En les explicacions i en les
preguntes dels participants es va fer especial esment a la importància dels
refugis i la conservació dels hàbitats per a la supervivència de les ratapinyades.
Moltes qüestions es dedicaren als problemes de la conservació d’aquests petits
mamífers, sobre tot en les conseqüències (unes positives, altres negatives) que
tenen les actuacions humanes en les seves localitats de caça, de descans i de
Els participants gaudiren d’un
vespre diferent a aquests espais i partiren molt satisfets. Agraïm a David
Garcia la seva predisposició, clares explicacions, paciència i bon humor per a
descobrir-nos més coses sobre els mamífers més desconeguts de les nostres
Els participants començaren a emprar els aparells d’ultrasons
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