摘要：The global climatic change could cause, in some places, appearance of meteorological phenomena consideredrare. If we understand the effect of these phenomena on birds we can understand how birds respond to weather changes.We report here the effect of a severe snowfall on hummingbird activity, flower abundance and hummingbird-plantinteraction in a temperate forest of central Mexico. During our study we registered 1 hummingbird species (Hylocharisleucotis) and 7 plant species (Fuchsia thymifolia, F. microphyla, Salvia amarissima, S. elegants, Cestrum roseum,Penstemon campanulatus and Lonicera mexicana). Before the sudden climatic phenomena we registered 66 recordsof hummingbirds, 8 700 flowers, and 6 hummingbird visits to flowers. During the phenomena, there were zerohummingbird records, 160 flowers and zero visits. A month after the event there were 67 hummingbirds records, 1 825flowers and 13 visits. Hummingbird activity recovered rapidly after the snowstorm, but 6 of 7 plants species lost alltheir flowers, except for L. mexicana, which received all hummingbird visits a month after the climatic event.
关键词：Biología; Zoología; Ornitología; Ecología;bird pollinated flowers; global climate change; hummingbirds; ornithophylous plant species; snowstorm effect; sudden changes in the average state of the time
