From Marc Isaacs
Your recent article about attaching cameras to animals to monitor their behaviour (19 January, p 22) got me thinking about the problem of the weight of the devices. Could this be avoided by distributing them throughout, say, a flock of birds? Perhaps one bird could carry a camera and low-power transmitter, with another carrying a receiver and storage device. This might mean that no individual bird has to carry anything excessively heavy.
Newport, Gwent, UK
