British Wildlife is the leading natural history magazine in the UK, providing essential reading for both enthusiast and professional naturalists and wildlife conservationists. Published eight times a year, British Wildlife bridges the gap between popular writing and scientific literature through a combination of long-form articles, regular columns and reports, book reviews and letters.
Conservation Land Management (CLM) is a quarterly magazine that is widely regarded as essential reading for all who are involved in land management for nature conservation, across the British Isles. CLM includes long-form articles, events listings, publication reviews, new product information and updates, reports of conferences and letters.
Zero-crossing is a type of frequency division system that counts every time a sound wave crosses an imaginary zero point and provides a frequency / time output. Zero--crossing detectors are primarily used to record bat calls for analysis with bioacoustics software and as they produce small file sizes are efficient with battery useage they can be left in the field unattended for long term monitoring. They only capture the loudest frequency at any one time, however, so harmonics are not recorded and the output does not contain amplitude information.