Guest visits by visiting researchers in Germany can provide fresh impetus for research while at the same time contributing to national and international networking. This is why the DFG provides funding for guest visits. The purpose of this Infobrief is to provide information on the use of this instrument in connection with DFG-funded coordinated programmes, also offering insights into the duration of visits and the countries of origin of the invitees. Finally, examples are provided to show the extent to which crises influence the mobility of researchers. For example, since the pandemic, the number of visiting researchers previously working in China or Russia has decreased, while the number of visiting researchers from Ukraine has increased since 2022.