Illustrative photo

A good way of explaining at the same time the meaning of the x-axis, and  how the pattern shown in the graph looks like in the real world. Note that the lower feather width in primary 8 is easily appreciated in the picture.

Reference Hingee, M. and Magrath, R.D. 2009 Flights of fear: a mechanical wing whistle sounds the alarm in a flocking bird. Proceedings of the Royal Society of London B published online 2 September 2009 doi: 10.1098/rspb.2009.1110 (Journal website)

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Diagram with photo and graph

This figure is very interesting because it combines in a clear way information about study species, material and methods and results.

Reference Kozak HK, Graham CH and Wiens JJ (2008) Integrating GIS-based environmental data into evolutionary biology.Trends in Ecology and Evolution 23 (3): 141-148. (download pdf) (TREE website)

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