The study led by the CSIC confirms that greylag geese spread several plant species between different habitats 300 kilometres from their origin.
Scientists have analyzed faecal samples and the movements of this species marked with GPS for the research carried out in Sweden.

A study leaded by researchers from the Doñana Biological Station (EBD-CSIC) and the Institut de Ciències del Mar (ICM-CSIC) estimated the seeds dispersed and beyond Barcelona based on the movement of gulls monitored by GPS telemetry and seeds detected in their diet.
Modelling shows that around 30% of the seeds (including native plants but also alien species) were dispersed by gulls within green urban areas, concentrated in two main hotspots (Ciutadella Park and Montjuic), with important...

A study demonstrates how poorly dispersal syndromes perform at explaining seed dispersal by animals (zoochory)
Only 4% of the many European plant species dispersed by ungulate endoozocoria belong to the corresponding syndrome.

It is well known that some plants and plant fragments can become attached to the feathers of ducks and other waterbirds and be transported short distances. An increasing diversity of plant seeds have also been shown to survive gut passage and to be able to disperse longer distances inside migratory birds. For the first time, this paper shows that entire flowering plants can be dispersed on the inside.