Less behavioral response during capture does not by itself demonstrate prevention of capture-related death.
Twenty-three wild Pyrenean capercaillies received intramuscular midazolam during GPS-tagging procedures, with flumazenil used for reversal. Sedation reduced responses to handling and facilitated field procedures. One bird died during handling. The investigators compared their observations with previous capture experience.
The series was small and lacked a contemporary randomized unsedated control group. Doses varied, and historical capture circumstances may differ. Apparent behavioral calm is not a direct physiological measure of stress or muscle injury, and one observed death leaves substantial uncertainty about uncommon risks.
For veterinary forensic review, distinguish restraint quality, physiological monitoring, recovery and post-release survival. Record species-specific context, handling duration and reversal response. Human benzodiazepine assumptions cannot be transferred directly to wild birds. This field experience demonstrates feasibility while leaving the magnitude of any survival benefit unresolved.
Source reviewed: Sedation of Wild Pyrenean Capercaillie Tetrao urogallus aquitanicus Using Intramuscular Midazolam (PMC9312258). Forensic applications above are interpretive analysis of the supplied publication.
Related reading: Midazolam Added to Palonosetron: Antiemetic Benefit Was Not a Sedation-Safety Verdict.