Gabriel has recently started his PhD project on Matching Habitat Choice. He uses captive Zebra finches and wild Tree sparrows to test experimentally whether matching habitat choice can lead to reproductive isolation: see more here about his project. He is also working on the development of new statistical models (Animal Models) to test for the effects of matching habitat choice in wild populations (funded by the FPU program of the Spanish Ministry of Economy and Competitiveness, co-directed by Francisco Pulido, Univ. Complutense, Spain).