Hello my name is Bun. If I don't take photos I'll die. Ask me about my favourite parasite.

 

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wobblegong
@wobblegong
Powerperpetuationsimulator
@Powerperpetuationsimulator asked:

Is the Ninox Strenua the only species of owl to eat bats, or do other species make meals of them regularly?

Great question! Let me just ask wikipedia a few questions real quick.
...
So I'm not sure about your question specifically, but the powerful boobook Ninox strenua is definitely an intriguing weirdo whose existence is worth rotating in one's head!

The fact that their specialty is arboreal prey is just kind of whack– I mean obviously it can work (IUCN 3.1 Least Concern) but wow ok way to style on everyone else by deciding you're gonna go for the RL equivalent of underwater combat. Furthermore this weirdo apparently has REALLY strong peets, which is behind the common name, and it's just very used to killing prey in a weight class way higher than other birds/owls its size can. The rule for basically all carniovores most of the time is you need to gank stuff smaller than you if you fight solo or else it's probably a net loss; in the boobook's case I suspect this is at least partially driven by the prey weight classes available to an owl who stalks tree canopies, but it's still wild to hear about it eating things as heavy as it is! Those peets could kill God if scaled up slightly.

Anyways I hadn't heard of this animal before so I was initially guessing it ate really small bats, which are plentiful in a lot of places and would be at least plausible prey items if you made me guess blind! I could believe a greater horned owl is capable of declaring a little brown bat dinner, it's just a matter of the tech matchup, y'know? But nay. Boobook is out here ganking flying foxes. What the fuck.

Anyways sorry for no answers (my specialty is what the bats are eating) but I love this thing and I'm going to tell people about it going forward. :D


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in reply to @wobblegong's post:

And rotaté I shall....

Really do wish I had a better answer about other bat-eaters, but I can't summon any research on the quick. The bat-eaters I'm aware of don't hunt in the open air, they're all cave opportunists, like snakes that sit at cave chokepoints or detrivores that hang out waiting for bats to die and fall off the ceiling. On the wing... I'm less sure! Where there's bats there tends to be BATS, so predation feels super plausible, but I'm not sure how strongly it's counteracted by bats being twitchy ESP meth rats. Owls are famously hard to see coming but that might very well be Uno reverse carded by echolocation, so... idk! It's a very good question.

i had a hunch of a way to look into this and sure enough - if you look at guides for identifying the bones found in owl pellets, bats are a known possibility! the one i looked at implied they were somewhat rare and it's usually the smaller bat species (once again affirming the power of this boobook); here's an example that was collected from a barn owl pellet https://www.researchgate.net/figure/Bat-skull-remains-identified-in-Barn-owl-pellets-collected-from-north-of-Portugal-a_fig1_275208417