Weekend readers' best photographs: tropical

'These visitors to the South Bank certainly knew how to keep cool in our tropical weather' Photograph: Verna Evans

'This delicate glass-winged butterfly lives in tropical climates. I just had to take a close-up to appreciate how beautiful it is' Photograph: Rosemary Wenzerul

'As close to a tropical storm as possible in Nottingham' Photograph: Drew Cox

'Hidden caiman in the wetlands of the Pantanal, Brazil' Photograph: Michael Poyser

'This didn't at all feel like two days after Christmas: the boys saw me sitting in the ocean with my camera, trying to cool off in the tropical heat, and couldn't wait to start posing' Photograph: Ellie Skinner

'A dead horseshoe crab washed up on a beach in Brunei' Photograph: Hazel Darwin-Edwards

'In Zanzibar they burn their boats after a days fishing to dry out the mango wood. This beach cyclist was bringing the palm leaves for the fire' Photograph: Patrick Law

'Early morning boat ride on the Kinabatanga river in Sabah, Borneo' Photograph: Rachel Meckler-Poyser