First warbler Yellow-browed, the dark bases to the secondaries and black-centred greater coverts leave few other options.
The denser nocturnal vapours, attacked by the warm beams, were dividing and shrinking into isolated fleeces within hollows and coverts, where they waited till they should be dried away to nothing.
In research funded by the European Union, Alessandro Bottaro of the University of Genoa in Italy has devised small keratin bristles that mimic the smallest type of bird feathers, known as coverts.
