Urbanization poses a significant threat to biodiversity worldwide. Yet, a few wild species of flora and fauna thrive in urban landscapes by undergoing certain trait adaptations. Birds are a well-studied taxon in terms of urbanization-induced trait changes. Some robust findings on ecological traits, life history, physiology, behavior, and genetic traits changes in individual species as well as bird communities have been observed. Urbanized birds differ in behavioral traits, showing an increase in song frequency and amplitude, and bolder behavior, compared to rural populations of the same species. Differential food resources and predatory pressure results in changes in life-history traits including prolonged breeding duration, and increases in clutch and brood size to compensate for lower survival. Other species-specific changes include changes in hormonal state, body state, and genetic differences from rural populations. There is a paucity of studies in tropical cities and a need for greater examination of traits that influence persistence and success in native vs. introduced populations.