Moving on, the paper itself describes a fossilised paleoflamingo twig nest from the Early Miocene of Spain, containing five eggs lying in-situ (in their 'real life' position in the nest). This is the first record of a fossil avian dinosaur twig nest, due to the fragile nature of such nests normally resulting in non-preservation. So, thank you taphonomic processes that allowed for the preservation of this nest!
Grellet-Tinner, G., Murelaga, X., Larrasoaña, J.C., Silveira, L.F., Olivares, M., et al. 2012. The First Occurrence in the Fossil Record of an Aquatic Avian Twig-Nest with Phoenicopteriformes Eggs: Evolutionary Implications. PLoS ONE 7(10): e46972. doi:10.1371/journal.pone.0046972