Oh, and I found the paper the news snippet was based on:
http://www.tandfonline.com/doi/full...76#.UqHV19JDui5

V. Dinetsa*, J.C. Brueggenb & J.D. Brueggenb

Abstract:
Using objects as hunting lures is very rare in nature, having been observed in just a handful of species. We report the use of twigs and sticks as bird lures by two crocodilian species. At least one of them uses this method predominantly during the nest-building season of its prey. This is the first known case of a predator not just using objects as lures, but also taking into account the seasonality of prey behavior. It provides a surprising insight into previously unrecognized complexity of archosaurian behavior.

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On the kinkometer, my kink measures as a sine wave.