Presumably ovipositing, otherwise I don't understand the curious dance this colourful fly was doing. Quite the display given its wing and body colours and patterns.
Low-light conditions, a bit blurred. Was fascinating to see, as it iterated over multiple target apids and stabbed them all. Aphids didn't even attempt to run. Interestingly, only chose small aphids, even a very small one (seen in this photo at the lower left, near the posterior tip of the wing of the wasp).
Loved the ending of the discussion, on why the head-direction circuit is organised in 8 columns:
"not all numbers of neurons enable a working circuit. The circuits for N=2 and N=4 are degenerate – either producing a single dimensional encoding, or two disconnected circuits that do not enforce the required circular topology. N=8 is the smallest power of two that could result in a non-degenerate circuit. This hints at the possibility that the eight-column architecture is not a chance evolutionary artefact, but rather that it is the genetically simplest circuit capable of performing heading integration."
Turns out all the "unremovable" Samsung apps from the android Galaxy A14 can be uninstalled after all. It's convoluted, but worth it: far snappier – far more responsive, less memory usage.
Enable developer options.
Under developer options, enable USB debugging.
connect to a laptop via USB.
Install "adb" (Android Debug Bridge) in the laptop, a command like tool. In Ubuntu 22.04, do "sudo apt install adb". There are packages online for other operating systems.
Discover which apps to remove. Not trivial, but there are various lists of Samsung "bloatware" online.
Then, use adb to discover which packages to remove. For example:
If no apps match the search, then use the "App List" (installable via F-Droid store) to list all user apps or system apps (from a toggle on the top-right menu), which lists all apps by name and with the package name under it.
An app that I removed that indeed drops some possibly valuable services but which greatly improve UI responsiveness: