The ideal for most telemetry studies is to attach the tag and automatically retrieve location data, in which case GPS gives you just that ability. We have GPS collars as light as 190 g and suitable for many species. Please contact us for the most up to date information. GPS technology can often be more economic for the project because labour costs are dramatically reduced.
When GPS collars are too heavy for your study species, local movements of the small species are still best served by traditional VHF beeper tags, although if recording presence/absence (for example visits to young or particular feeding areas) then Coded VHF tags combined with an SRX800 receiver can help prevent missing events.