https://phys.org/news/2019-03-owls.html

The movement-behavior parameters in the model were estimated using Bayesian statistical inference based on radio telemetry data of juvenile little owls. Amongst other things, the researchers were able to show plausible inter-individual and -sexual behavioral differences—female juvenile little owls tend to move more directionally and fly longer distances during the dispersal phase, while their male counterparts are characterized by a tendency to take longer rests, and show a greater attachment to suitable habitat.

Hauenstein explains that the findings indicate that the little owl's natural re-colonization of northern Switzerland is generally possible, however there are restrictions, "Fragmented urban areas in particular, such as those around the tri-border area near Basel, appear to limit the movement of juvenile little owls drastically. Besides that, little owls avoid forested areas because that is where their natural enemy, the tawny owl, can be found; they also avoid higher altitudes such as the Swiss Jura, the Black Forest and the Swabian Alb." In the study, the scientists highlight existing but narrow dispersal corridors, for example the lower Aare valley or the Fricktal south-east of Basel. By improving the habitat for the birds there, e.g. by agricultural extensification and nest box provision, it may be possible to expedite the re-colonization of northern Switzerland by the little owl.

                                                            
                                    
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