Ahh, that's because they use stealth technology
............................. !!
Mark
On 31/03/2021 5:48 pm, Nick Payne via Canberrabirds wrote:
> I noticed, from where we were sitting, that the flying foxes in
> Commonwealth Park were quite disturbed by the F/A-18s each time they
> flew over, erupting from their roosts and flying around for a minute or
> two before settling again, whereas the F-35s, which sounded exactly the
> same to my ears, elicited no such response from them.
>
> Nick Payne
>
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