Firebugs (Pyrrhocoris apterus) [1] tend to aggregate in a sunny spot. Here they aggregate on a leaky garden hose connection, probably also for the moisture.

References
1 Nederlands SoortenregisterPyrrhocoris apterus (Firebug)
OBSERVATION:
2021-VII-03
Firebugs (Pyrrhocoris apterus) [1] tend to aggregate in a sunny spot. Here they aggregate on a leaky garden hose connection, probably also for the moisture.
References
1 Nederlands Soortenregister