«We still don't have a good theory that explains
how the cicadas» resource pulse causes the birds» populations to reach their low point exactly 13 and 17 years later,» Koenig says.
It remains uncertain specifically
how cicadas might orchestrate the behavior of other species over such long time periods.
«Our hypothesis is, frankly, hard to believe, even by us, if for no other reason because we know of no mechanism to explain
how cicada emergences could be driving a cycle in the birds that is so long — 13 or 17 years,» Koenig says.
Not exact matches
And we'd end up sitting on a curb in the parking lot by the light of a street lamp, listening to night
cicadas or cars going by, and we would talk about
how no one had ever, could ever, have been in love like we were in love, and we would kiss until we were dizzy before walking back to the dorms, just in time for curfew.
And a quick learner, my older toddler can explain evaporation,
how geysers work, and the life cycle of
cicadas.
So
how do the
cicadas manage to manipulate the birds over these long cycles?
Knowing that researchers in the early 20th century had shown that avian predators can wipe out an entire population of
cicadas that emerges out of sequence, Koenig decided to take a look at
how bird populations might affect the insects» cycles.
Cicadas are a common soundtrack to summer, but did you know species vary depending on
how many years they spend underground as larvae?
Collecting the shells will tell you
how many and what kind of
cicadas inhabit a certain area.»