The Jackdaw Journal
A Publication of M2 Communications

jack-daw [JAK-dah], n. 1. a glossy, black, European bird, corvus monedula, of the crow family, that nests in towers, ruins, etc.; has a proclivity to collect bright objects that attract its attention; can include bits of ice, things round or square, twigs, filaments of light bulbs; specialist on the lookout of what fits the construction of its nest.

jackdaw journal [JAK-dah JERN-al], n. 1. a repository of bright objects — wit, wisdom and whimsey — collected and/or created by Michael McKinney.   2. a web log or blog




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How Wolves Change Rivers

February 28, 2014

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable “trophic cascade” occurred. A trophic cascade is an ecological phenomenon triggered by the addition or removal of top predators – in this case the wolf -- creating reciprocal changes in the relative populations of predator and prey. It often results in dramatic changes in ecosystem structure. This short video provides a facinating look at that process. We are truly connected.



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