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bird migration birding climate martins phenology swallows swifts

Swifts, Swallows, Martins – Flickering Spirits of an African Sky

Are there easily observed birds whose fluctuating status exposes changes in the underlying ecological circumstances – revealing the true health – of an environment, be it a village, a district, or a nation? Apart from at the freezing Poles I suggest that we should look at Swifts and Swallows! Now you may think this a wee bit perverse. After all these are not creatures of the terrestrial environment. […]