Here you can find our most recent paper on the cost of prospecting for dispersal opportunities in the Seychelles warbler – a cooperatively breeding bird species. In many cooperative breeding species, young individuals delay dispersal and remain in their natal territory for a prolonged period, rather than acquiring their own independent breeding position. To locate available breeding positions, young individuals frequently undertake prospecting trips from their parents’ territory. Here we show that such prospecting trips appear costly as individuals lose body mass during prospecting trips. High energetic costs of prospecting may contribute to an individual’s decision to delay dispersal.