The Missing Link: EMFs
Careful not to omit the influence of anthropogenic non-ionizing electromagnetic fields (EMF) e.g. radiofrequency radiation (RFR) in particular. Relatively biologically confusing (pulsed) microwave transmissions have only become ubiquitous in certain environments in the last decade or two
Anthropogenic radiofrequency electromagnetic fields as an emerging threat to wildlife orientation
The singular impact alone is understood to be devastating in many species, including and especially winged animals that utilise relatively subtle natural EMFs for various functions including navigation
A 2018 Horizon Scan of Emerging Issues for Global Conservation and Biological Diversity
The additive, interacting, and synergistic effects of EMFs when combined with other environmental hazards (e.g. persistent particulate pollutants) is also understood to be highly problematic (yet to be elucidated)
The EU Commission: GERoNiMO Project – Work Package 4: Animal models