An efficient survey method for estimating populations of marsh tits Poecile palustris, a low-density woodland passerine
Author(s): Broughton, R.K., Dadam, D., Maziarz, M., Bellamy, P.E. & Hinsley, S.A.
Published: September 2018 Pages: 7pp
Journal: Bird Study Volume: 65 ( part 3 )
Digital Identifier No. (DOI): 10.1080/00063657.2018.1517243
Capsule: A playback survey comprising two visits to woodland in early spring can reliably detect Marsh Tits Poecile palustris and permit reasonable estimation of the number of territories.
Aims: To assess the efficacy of an efficient survey method for detecting and estimating populations of Marsh Tits.
Methods: Detection probability of colour-marked Marsh Tits, surveyed using playback, was assessed with Cormack–Jolly–Seber models. Reliability of territory estimates was compared between colour-marked and largely or wholly unmarked populations.
Results: Playback surveys over two visits in early spring were highly effective in detecting individual Marsh Tits. Territory estimates were similar for woods in years where less than 20% of the population was marked compared to years when a higher proportion of birds were colour-marked, although territories may be underestimated in larger woods with unmarked populations.
Conclusion: A playback survey comprising two visits in early spring is recommended as an efficient method of surveying Marsh Tit populations and locating individuals. A survey protocol is suggested.
What’s the score for Copeland’s symphony of seabirds?
Northern Ireland Seabird Coordinator Katherine Booth Jones describes her love for the wild coastal habitats of Northern Ireland and the charismatic seabirds that inhabit them.
Working together for seabirds
BTO work supports effective monitoring of our seabirds and aims to provide opportunities for a new generation of seabird surveyors.