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Thus, the cattle we raise for meat and dairy are sometimes called Bos taurus while the extinct wild form is always called Bos primigenius. Early research suggested that “Fragmented distributions and population bottlenecks due to human activities appear to have increased genetic differentiation among populations” (Leberg 1991).
I want to talk about this research but if you really want to know more about it, don’t rely on me; one of the co-authors of this important paper is Darren Naish, who happens to be a stupendous blogger, and he has written the research up here. PNAS 2012 109 (27) 10927–10930; published ahead of print June 4, 2012, doi:10.1073/pnas.1204026109).
To an intermediate-level birder like me, the material in Better Birding –highly focused, detailed, based on the latest research and years of field experience– is daunting, but also fascinating. Sullivan are birders as well as writers, researchers, and organizational administrators, and this makes a big difference.
Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Las Vegas – Sunset Park. 04 Apr 2018. Bridge on Ruta 1.
Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Las Vegas – Sunset Park. 04 Apr 2018. Bridge on Ruta 1.
Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Las Vegas – Sunset Park. 04 Apr 2018. Bridge on Ruta 1.
Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Ridgway’s Rail – Rallus obsoletus. 01 Jan 2018.
Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Ridgway’s Rail – Rallus obsoletus. 01 Jan 2018.
International Birding and Research Center Eilat (IBRCE). Cattle Egret – Bubulcus ibis. International Birding and Research Center Eilat (IBRCE). International Birding and Research Center Eilat (IBRCE). Cattle Tyrant – Machetornis rixosa. International Birding and Research Center Eilat (IBRCE).
Cattle Tyrant – Machetornis rixosa. Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Hopland Research and Extension Center (restricted access). Cattle Egret – Bubulcus ibis. Las Vegas – Sunset Park. 04 Apr 2018. Bridge on Ruta 1.
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