Fatty acid profiles of great tit (Parus major) eggs differ between urban and rural habitats, but not between coniferous and deciduous forests.

Indeed, the urban birds in Sweden showed a trend both for higher relative oleic acid levels (thus also total MUFA) and lower relative levels of the major ω-6 and ω-3 PUFAs, compared with the rural birds (Andersson et al. 2015 ), which is similar to what we found in the yolks in the present study.

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