The Moore Lab’s primary collector took field notes recording each place he visited in Mexico, the birds he collected there, and descriptions of the habitat. These field notes provide valuable metadata that help researchers locate his exact collecting sites and understand environmental change through time. He likely wrote these field notes knowing they were for his employer and the collection, so in parallel, Lamb also kept a personal journal of his activities, generously donated to the Moore Lab by his children. These journals also record his travels and activities, but also mention his family and others he traveled with.