Air temperature and rainfall data for one week before and during the sampling dates are shown in Supplementary Fig. S1. The mean daily temperatures during this period ranged from 19 °C to 24 °C for Estelí (Nicaragua), 23 °C to 31 °C for Patía (Colombia), 27 °C to 29 °C for Taluma (Colombia), 17 °C to 25 °C for Rio Grande do Sul (Brazil), 15 °C to 26 °C for Balcarce (Argentina), 8 °C to 16 °C for Manfredi (Argentina) and 26 °C