From location pings to a connected layer of animal behaviour, physiology and environmental intelligence.
Biologging begins where direct observation ends: underwater, at night, across migration corridors and inside the moving body.
A biologger is a miniature electronic instrument carried by an animal to record or relay its movement, behaviour, physiology, or surrounding environment.
A logger stores measurements for later retrieval; telemetry sends them by radio, cellular, acoustic, or satellite links. Modern systems frequently do both.
D1GNSS · acoustic · PIT
IMU · depth · camera
heart · heat · chemistry
light · sound · ocean
The field is moving from tracking points to connected inference systems: multimodal sensing, onboard intelligence, global relay and shared data standards.
Ranked by novelty, evidence strength and likely field impact—not by market share or hype.
ICARUS 2.0 put Raven, its first dedicated microsatellite, into orbit on 3 May. The planned constellation is designed for up to six animal-tag updates per day.
T1The launch validates infrastructure—not yet full ecological performance, access, or tag lifetime.
A solar + motion-powered microneedle ear tag continuously monitored pH, K⁺ and Ca²⁺ and inferred five metabolic states in minipigs.
T2A controlled three-animal study is not evidence of production or wildlife readiness.
Compact models now classify behaviour on low-power tag hardware, enabling alerts instead of continuous raw-data transmission.
T3T4C2Bounded livestock tasks do not establish transfer to unknown wildlife behaviours.
Camera, depth and acceleration packages reveal the behavioural meaning behind ambiguous movement traces in animals humans cannot follow.
T5Video is power- and data-heavy, short-duration and usually recovery-dependent.
Live feeds, controlled sharing, common vocabularies and welfare metadata are turning isolated deployments into reusable infrastructure.
P2C1C3Infrastructure cannot repair poor design, missing metadata or structural geographic gaps.
The strategic work is no longer only a better tag. It is coverage, shared receivers, governed data and a pathway into decisions.
Global · Germany-led
Constellation build 2026–27Low-Earth-orbit receivers + lightweight tags
Two more 2026 launches were planned at cutoff
Global
Long-term infrastructureArchive, live feeds, QA, analysis and data permissions
MoveApps, MoveTraits and conservation partnerships
Global · Canada-led
ActiveAquatic acoustic telemetry + shared receiver arrays
MOSAIC collaboration and November symposium
Europe
Ends 31 Dec 2026Four strategic marine straits + policy-ready data
Handoff toward an operational European network
Global ocean
UN Ocean Decade · 2021–30Animal-borne profiles in poorly sampled waters
Broaden variables and common campaign reporting
Europe
2024–27Multisensor tags on declining migratory gamebirds
Turn fine-scale tracks into habitat policy
A conservative comparison of the strongest verified 2026 signals—not a league table of national capability.
Cross-border marine arrays, multisensor bird tracking, livestock traceability and sovereign satellite coverage.
The 2026 JRC review says GNSS/IoT ear tags are mature for livestock identification, while STRAITS and HABITRACK connect tracks to policy.
Interoperability with government systems, common standards, cost control and GDPR-compliant uptake.
Catharina Olsson · Andreas Ekström · Erik Sandblom · Albin Gräns (SLU)
Johan Höjesjö · Madeleine Berry · collaborators
Jessica Harvey-Carroll · Daire Carroll
Lerum Energi and Partille Energi are Greater Gothenburg deployment partners. TiVA of Kalmar supplies the fixed AI fish-camera system at Hedefors; it is adjacent monitoring, not an animal-borne logger.
SE2SE7Use Säveån and the west-coast eelgrass projects as an aquatic living lab that links physiology, PIT histories, fixed AI observation and habitat restoration.
Every gain in resolution, duration or connectivity carries a burden in power, interpretation, welfare, maintenance or governance.
A tag can alter the physiology, behaviour, survival or demography it is meant to measure.
Video, high-rate GNSS and uplink compete with weight, lifespan and welfare.
Closed-set models can confidently force an unseen action into the nearest known class.
Billions of records still vary in units, vocabulary, quality flags and deployment metadata.
Cameras need recovery, acoustic arrays need maintenance, and marine attachments foul or detach.
Hardware, connectivity, analysis and authorship remain concentrated; tracks can expose sensitive animals and places.
The next year will be defined by whether 2026 prototypes and projects become reliable services, standards and decisions.
Additional launches, update cadence, tag availability and independent ecological deployments.
T1Open-set behaviour, on-tag confidence and selective raw-data retention.
C2T3T4Checklist adoption ahead of the planned 2027 International Bio-Logging Society workshop.
C1C3STRAITS handoff, HABITRACK habitat guidance and EU livestock-system integration.
P4P6EU1A shared design linking physiology, PIT identity, AI passage video and restored habitat on the same animals.
SE1SE2SE4Only material published, updated or captured inside the 2026-01-01 to 2026-08-12 evidence window is included.
This is a decision-oriented evidence scan, not a systematic review or complete commercial landscape. “Top five” ranks the strongest 2026 research signals by novelty, evidence quality and likely field impact.
Fixed cameras, drones, eDNA and isotope reconstruction are labelled adjacent unless they are explicitly paired with animal-borne tags. Commercial claims are excluded from the ranking unless supported by institutional or peer-reviewed evidence.
The full narrative report and machine-readable source register live in data/research/ for the next review round.