1All S, Ripley SD, 1998. Handbook of the Birds of India and Pakistan (Robins to Wagtails). New Delhi: Oxford University Press.
2Amrhein V, Erne N, 2006. Dawn singing reflects past territorial challenges in the winter wren. Anim. Behav. 71: 1075-1080.
3Bell HL, Swainson GW, 1985. The colonization, ecology and breeding of the pied stonechat Saxicola caprata at Port Moresby, Papua New Guinea. Ibis 127: 74-83.
4Catchpole CK, Slater PJB, 1995. Bird Song: Biological Themes and Variations. Cambridge: Cambridge University Press.
5Cuthill I, Hindmarsh A, 1985. Increase in starling song activity with removal of mate. Anim. Behav. 33: 326-335.
6Kempenaers B, Verheyen GR, Dhondt AA, 1997. Extrapair paternity in the blue tit Parus caeruleus: Female choice, male characteristics, and offspring quality. Behav. Ecol. 8: 481--492.
7Krebs JR, Avery M, Cowie RJ, 1981. Effect of removal of mate on the singing behavior of great tits. Anim. Behav. 29:635 637.
8Kroodsma DE, Bereson RC, Minear E, 1989. Use of song typesby the chestnut-sided warbler: Evidence for both intra- and inter-sexual functions. Can. J. Zool. 67: 447-456.
9Kunc HE Amrhein V, Naguib M, 2005. Seasonal variation in dawn song characteristics in the common nightingale. Anita. Behav. 70: 1265-1271.
10Lambrechts M, Dhondt AA, 1988. The anti-exhaustion hypothesis: a new hypothesis to explain song performance and song switching in the great tit. Anim. Behav. 36: 327-334.
