How tall is an ostrich?
Common ostrich
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As ambient air becomes hotter, additional evaporation can take place lower in the trachea making its way to the posterior sacs, shunting the lung surface.[62] The trachea acts as a buffer for evaporation because of the length, and the controlled vascularization.[62] The Gular is also heavily vascularized; its purpose is for cooling blood, but also evaporation, as previously stated. Air flowing through the trachea can be either laminar or turbulent depending on the state of the bird.[64] When the common ostrich is breathing normally, under no heat stress, air flow is laminar.[62] When the common ostrich is experiencing heat stress from the environment the air flow is considered turbulent.[62] This suggests that laminar air flow causes little to no heat transfer, while under heat stress turbulent airflow can cause maximum heat transfer within the trachea.[62]