Fig. 1

Data and estimates for selected areas. a Amtali, Bangladesh (sub-district); b Bamboutos, Cameroon (department); c Batha Est, Chad (department); d Kalangala, Uganda (district)
Data and estimates for selected areas. a Amtali, Bangladesh (sub-district); b Bamboutos, Cameroon (department); c Batha Est, Chad (department); d Kalangala, Uganda (district)