In 2003, nest monitoring of the known goshawk nests took place at all known nest sites. In addition, follow up field surveys were made at all locations where goshawk or possible goshawk sightings had been made. Despite this intensive approach only one of the six known nest areas was active and only one new goshawk nest area was located. Although sample sizes remain small, the breeding success this year was consistent with the pattern seen in the past 5-6 years, with low re-occupancy rates and few young fledging per breeding attempt, compared to other goshawk populations. This year's results are also consistent with earlier work which indicates that at the present rate of productivity, insufficient young are being produced to allow the population to be maintained, unless birds are moving to the islands from elsewhere. Diet analysis was conducted for pellets collected at the two active nests this year, and from two other nests active in past years. This showed a consistent pattern between nests, and also with prey samples collected on Vancouver Island and in the adjacent Hemlock forests of Interior BC, with forest birds and mammals contributing equally to the diets. This work, in conjunction with further DNA analysis and habitat suitability mapping, will provide information integral to Weyerhaeuser Ltd goals of managing goshawks within their landbase.
Doyle, Frank I.. 2003. Managing for goshawks in TFL 39 on Haida Gwaii/Queen Charlotte Islands: goshawk nest monitoring and diet in 2003. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2003MR044
Topic: FLNRORD Research Program
Keywords: goshawk, nesting, survey, diet, TFL 39, Queen Charlotte Islands
To copy the URL of a document, Right Click on the document title, select "Copy Shortcut/Copy Link", then paste as needed. Only documents available to the public have this feature enabled.