Monday 9 October 2023

Bats

 

Bats

Britain's largest bat, the Noctule, is about 8cms (3") long, It eats moths, chafers, mayflies and flying ants and lives for about 5 years.

Image courtesy of Wikimedia Commons

We had a sad little WhatsApp message from Susannah last night:-

‘The cats just murdered a bat in the house😨

I was quite impressed by that, though feeling sorry for the bat, and thinking that cats were not likely bat predators. How wrong I was! When I looked for more information I discovered that cats are responsible for a great number of bat fatalities. They can hear bat calls and may sit just beneath a roost and leap to catch bats as they emerge. They are thought to be among the most significant predators of bats, along with owls, principally the barn owl and the tawny owl.

The advice to concerned cat owners is to keep their cats indoors half an hour before and one hour after sunset. However, Susannah’s unfortunate ‘guest’ was in the house, so asking for trouble, dicing with death, in fact.

Although I find these furry flying mammals very interesting, they are not very attractive with their pug noses. They don’t really look like pretty little mice with wings!

                                                          Noctule
                                          Image courtesy of Wikimedia Commons

Worldwide, there are more than 1,400 species of bats and the majority are nocturnal. Around ten species are diurnal. They are the megabats, the flying foxes or fruit bats.

Almost a quarter of UK mammals are bats. There are 18 species, ranging from the Pipistrelle, (Pipistrellus) the smallest and commonest, to the largest bat, the Noctule (Nyctalus noctula). Pipistrelle comes from the Italian ‘pipistrello’, meaning bat.

Britain's smallest bat, the Pipistrelle, is less than 5 cms (2") long. It can live for 4-5 years and will eat 3,000 insects a night. Its diet consists of flies, moths, midges and mosquitoes.

Image courtesy of Wikimedia Commons

All UK bats and their roosts are protected under European and UK legislation because these small mammals have been significantly in decline for a few decades. There are many reasons for this, including a loss of habitat and a considerable decrease in insects.

All British bats hibernate. They are one of only three British mammals to do so, the other two being hedgehogs and dormice. Bats usually start hibernating in November, when cold weather has significantly reduced the insect population. When they hibernate, their bodily functions slow down, using less energy. Their heart rate, which is over 1,000 beats per minute in flight, reduces to around 20 beats a minute. Their breathing also slows. The decrease in metabolic activity enables the bats to survive for longer on the fat reserves they built up prior to hibernating. In warmer spells in the winter the animals may wake up and fly to different locations or seek food before going back into hibernation.

Bats hibernate in a variety of places. About three quarters of them roost in trees, others enter caves or tunnels, while yet others find shelter in barns or the roofs of houses. They have no means of drilling holes in trees or making nests so use whatever they can find.

Bats mate in the autumn but the females store the sperm so that they become pregnant in the spring. Delayed implantation (embryonic diapause) is a strategy used by around one hundred mammals, including stoats, badgers, rodents and roe deer.  In this way, the bat pups develop at a time when food is more readily available.

 Bats emerge from hibernation in May. Babies are born between the middle of June and August and are fed by their mothers for four to five weeks, until they are strong enough to fly. When they are very small, they cling to their mothers while they fly out to catch food. Once they are too heavy to carry, their mothers leave them holding onto a wall, or branch while they hunt for food.



'An  Inconvenience' by John Banister Tabb

To his cousin the Bat

Squeaked the envious Rat,

"How fine to be able to fly!"

Tittered she, "Leather wings

Are convenient things,

But nothing to sit on have I."

Father John Banister Tabb (1845-1909) was an American poet, Roman Catholic priest and professor of English

20 comments:

  1. Love the rhyme. To me, bats always look quite sinister which, I guess, is why they are so linked with Hallowe'en - one reason anyway. I didn't know cats went for them though.
    xx

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    1. I think maybe they're considered sinister because they flitter and change direction so quickly that it's difficult to focus on them.

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  2. There is a healthy population of pipistrelle bats living in the old Scots pine in my Torridon garden. They don't seem to have a significant impact on the midge population, more's the pity!
    Cheers, Gail.

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  3. I can't remember to have seen a bat probably I have, in a zoo but not outside. I must have seen one at least when I met Dracula at Halloween. Poor thing being eaten by a cat, did Susanna ask if the taste was good or not ? My cats are ordinary they only eat mice and birds and spiders !

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    1. They didn't eat it but left it on the stairs, a nice little trip hazard!

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  4. We used to have bats in our garden when we lived in a village outside Harrogate. I once watched through the kitchen window as our cat snatched one from the air. We rescued it but it died anyway. The kids did find it very cool to see one up close as we would often lie on the trampoline and watch them flutter around in the twilight.

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    1. That was a lovely opportunity for the children.

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  5. I'm afraid l disagree...I find Bats faces quite attractive,
    especially the long eared bat...one would say cute...!
    But! Then, l find most things ugly, or weird..attractive..!
    And especially summat different, unique, or special...!

    Lovely things to watch sat out on an early evening, out
    on the patio, with a green tea, honey and lemon...!
    Amazing how they miss each other in flight...Lovely..!
    🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇 🦇

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    1. People still worry about them getting caught in their hair!

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  6. We had a thriving bat population in and around the garden in our previous house but, as WFT Nobby said, they didn't seem to make a dent in the midge numbers.

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    Replies
    1. . . . but there might have been millions more without the bats ;-)

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  7. I know how important bats are. I am sorry we have the white nose fungus here in USA. I enjoy sitting in early morn watching them fly about before sun up. We have a species here in Ohio that hibernates in attics if possible, otherwise trees. But the other 3 or 4 actually migrate south for the winter. Mine have left weeks ago and now the nights are truly cold and the sun not up until 7:30 and I miss them.

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  8. We have bats around us, thankfully, feeding on the midgies

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    1. I hope they're managing to deplete the population!

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  9. Bats are fascinating, aren't they? But oh that poor creature murdered by Susannah's cats :-( The poem made me smile, though :-) xxx

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    1. She's not sure which cat was responsible - they all looked most innocent! x x x

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  10. We don't have bats here but did have one in a haybarn on a farm we once lived on. Looking at the photos they remind me more of rats than mice! Yuck.

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    Replies
    1. They are odd little creatures, but important and fascinating.

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