Sentence:  More noises came from a dusty tree, where brown birds creaked and floundered about looking for insects; another bird, the invisible <WSD>coppersmith</WSD>, had started his ‘ponk ponk'. 
Meaning of the word marked with <WSD> tags:  A South Asian barbet, (noshow=1), with crimson forehead and throat, best known for its metronomic call that has been likened to a coppersmith striking metal with a hammer.