Moerdijk Field Research 2005-2006(last update: 14 August 2010) |
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coordinators: Roland-Jan Buijs Theo Muusse Mars Muusse Introduction |
Larus argenatus argenteus, Moerdijk, the Netherlands.
The combination P10 with P5 as mentioned by Bruce Mactavish & Peter Adriaens (and see on previous page) could turn out to be diagnostic for smithsonianus. However, these two birds from Moerdijk on the previous page (mVZ & oHE) may come close to what is defined as the primary patterns for smithsonianus. Bruce & Peter continue their article for cases where P5 has no complete band. In such birds, there should be a following set of five features: a: P10 again the broad rectangular tongue, combined with a complete sub-terminal band. b: P9 has no mirror or a mirror only on the innerweb. c: P7 (& P8) show bayonets. d: P8 has a white tongue-tip on the innerweb. e: P6 shows a "W" sub-terminal band. Considering the vast variation in possible patterns on the outwing in Moerdijk Herring Gulls, as is shown on the pages of this website, one may wonder if such a combination of features may occur in (probably a very small portion of) Dutch breeding Herring Gulls as well. Below, some example birds which come close regarding this set of five. Below: Herring Gull oPL: Below: Herring Gull m39: Below: Herring Gull m42: |
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