Pretty sure this is 4th instar? Looks like it according to https://www.britishbugs.org.uk/heteroptera/idcards/life_stages.html
неутомимый певец
Common Nightingale singing at Aeschfeld - 2024-05-26 21:37
(Merlin Sound ID)
Possibly Common Quail calling at Aeschfeld - 2024-05-26 20:36
(Recorded with Merlin Sound ID)