Effects of Spring Leaf-Fall on Composition and Density of Breeding Birds in Two Southern Arizona Woodlands
Balda RP. 1970. Effects of Spring Leaf-Fall on Composition and Density of Breeding Birds in Two Southern Arizona Woodlands. The Condor. 72(3):325-331
The pattern of leaf-fall, flowering, and appearance of new oak leaves exerts two principal effects on the diversity and density of breeding birds in these two woodlands in the Chiricahua Mountains of Arizona. First, the loss of oak leaves may result in a loss of potential nest-sites for birds that nest in tree foliage. Second, the flowering and growth of new leaves attracts large numbers of insects that serve as an abundant source of food for birds that nest in other sites