Our laboratory studies the adhesive prey capture threads of spider orb webs. We are learning how the thread’s hygroscopic glue droplets respond to differences in environmental humidity and how differences adapt species to habitats with different humidity regimes. This requires us to characterize the material properties of the viscoelastic, adhesive glycoprotein core at the center of each droplet and to understand how the adhesive forces of multiple droplets are summed to generate an efficient adhesive delivery system.