This summer there will be 15 cuckoos, each fitted with satellite tags, being monitored on their migration journeys to and from Africa by researchers from the British Trust for Ornithology (BTO).

The tags have so far provided information new to science. Researchers have discovered that some birds stay in Britain for only about a month each year; that they overwinter in the Congo rainforest; and that each bird uses a different route to get there and back. The initial findings, however, have posed further questions and so, as the project moves into its fourth year, the scientists are aware that there is even more to learn about what influences the successes and failures of the birds' migration. Eventually, this learning will inform what steps need to be taken to improve their chances and save them from becoming further endangered.
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