Monday, July 9, 2012

Gone batty

It is now 1.30am and I have just returned from another field day. This time it was bats:)

I have joined Bat Association to help with their current joined project Life at night. It is reasearching the influence of lights (especially church lights) on the behaviour of bats. They are trying 3 different lights (standard and 2 other - I think red and another one that I can't remember right now) too see if the new or same lighting in any way changes the time when  they start flying out to feed. They are mainly centering their attention on Lesser horseshoe bat (Rhinolophus hipposideros) 
as it seems this species is more endangered.


The problem with lightning is, if the lights are too bright the bats will fly out later and not soon after the sunset when the insect numbers are the highest. This results in bats getting less feed as they miss the insect peak. If this happens too often there is a high risk of starvation.


Hopefully with these results we'll be able to see which lights disturb them the least (9 churches are included in the project, from 3 different areas. Three in the same area, each with different lighting for a year). I only hope, since the association will only be able to strongly suggest the new lighting (if it is different than the previous one) to the church and people, that they will listen and change it for the bats.


Cute female resting after returning from feeding.


I was also lucky enough to help with measuring of babies. Well actually I didn't do a lot of measuring since to be able to do that one had to first climb above the bells (mind you getting to the bells wasn't a problem), and as I am a bit on the shorter side, reaching all the hand or leg holds - no starirs! - that others before me (all taller than me by 10cm) used proved impossible. But then I got to explore other rooms next to the bells (where I was able to take this photo) as others did the measuring. As you can see I didn't find any baby bats, but this female was nice enough to pose for a bit.

Hopefully next time (in another church) I get to photo and maybe even hold a baby bat too.

Saturday, July 7, 2012

The wonder snail

I've been having some problems with algae in my aquarium. Luckily it's just brown algae (which I read are common in new tanks and are easily removed), not like the last time when I had huge amounts of green algae.

I wanted to get something that would eat the algae and as I don't really want a fish I decided snail would be a way to go. Last time I tried with apple snails, which sadly didn't end well (for snails or my aquarium which ended overgrown with algae) so I did a bit of reading and saw how everyone were saying how great Nerite snails are. Since these snails need brackish water to grow up after hatching and no one here has managed to raise them yet I had to visit my local aquatic shop. They are a bit pricier than apple snails (ok a lot pricier), but I have to say I'm impressed.

After being in my aquarium for only a day the busy snail already cleaned about a third of one glass. Which is really impressive considering how much algae there was (and since I saw it crawling on my sponge filter which has quite some algae too, I imagine it ate alot more).
I am even considering buying a second one to help with the cleaning:)

(picture coming soon)