Later that day, I visited Thompson Water and suspicions were confirmed when I both heard and saw Cetti’s Warbler close to on the raised bank. Further visits to this site saw a continuation of observations of the bird along with song being heard, however, these visits were rewarded in spring of 2007 when I saw both male and female Cetti’s Warbler moving through undergrowth close to with the female carrying nesting material.
The male Cetti’s Warbler continued to sing and unusually he was often seen on exposed perches. Previous searches of this species at other sites have been difficult; however, my first superb views of this often secretive bird occurred on my home patch.
Between the arrival date of Cetti’s Warbler at Thompson Water and the to the time of writing (March 2013), I have counted a maximum of 5 singing birds around the water (summer 2012), this is an excellent increase in numbers of territories, it also demonstrates the resilience of Cetti’s Warbler given that we have had two severe winters since that pioneer bird of 2007. Song is not only confined to the breeding season, given that this species is resident, it can also be heard giving its loud burst of song even on the coldest, murkiest days of winter.
The habitat around the periphery of Thompson Water is very much suited to Cetti’s Warbler with dense reed-beds and swampy tangled
Due to its secretive nature it is more likely that visitors to Thompson Water will hear this enigmatic Warbler giving its explosive song from the dense cover around the water, however, if you do see a Warbler species in a thicket with warm red-brown upperparts and a broad, often cocked tail, it is likely to be a Cetti’s Warbler and if it sings, I can guarantee that you will be surprised by the volume of the song for the size of the bird.