Changes

* Psittacines, Passerines, Pidgeons and birds of prey all have no phallus.

* Psittacines, Passerines, Pidgeons and birds of prey all have no phallus.

* Copulate by transferring semen from the everted [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]] directly into the female [[Exotics_-_Anatomy_of_the_Female_Reproductive_System_-_Anatomy_%26_Physiology#Oviduct|oviduct]].

* Copulate by transferring semen from the everted [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]] directly into the female [[Exotics_-_Anatomy_of_the_Female_Reproductive_System_-_Anatomy_%26_Physiology#Oviduct|oviduct]].

=== Non-Protrusible Phallus ===

=== Non-Protrusible Phallus ===

* Ratites and Anseriformes

* Ratites and Anseriformes

* Elongated, capable of true intromission into the female [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]].

* Elongated, capable of true intromission into the female [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]].

* Distal end lies enclosed in a cavity on the floor of the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]] and becomes engorged with lymphatic fluid.

* Distal end lies enclosed in a cavity on the floor of the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]] and becomes engorged with lymphatic fluid.

** Anseriformes have a curved, fibrous phallus that conveys semen via a spiral groove.

** Anseriformes have a curved, fibrous phallus that conveys semen via a spiral groove.

* Dorsal Procotodeal Gland

* Dorsal Procotodeal Gland

* Lymphatic Folds

* Lymphatic Folds

These are either in proximity to, or are an integral part of the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]].

These are either in proximity to, or are an integral part of the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|cloaca]].

=== Dorsal Procotodeal Gland ===

=== Dorsal Procotodeal Gland ===

* Found on the dorsal [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|proctodeum]].

* Found on the dorsal [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|proctodeum]].

* Develop to varying degrees.

* Develop to varying degrees.

* Undergo [[Disorders of Cell Growth - Pathology#Hypertrophy|hypertrophy]] in response to '''steroid sex hormones'''.

* Undergo [[Disorders of Cell Growth - Pathology#Hypertrophy|hypertrophy]] in response to '''steroid sex hormones'''.

=== Lymphatic Folds ===

=== Lymphatic Folds ===

* Found within the wall of the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|procotodeum]].

* Found within the wall of the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|procotodeum]].

* Contribute to the lymphatic erection of the either cloacal or phallic tissue.

* Contribute to the lymphatic erection of the either cloacal or phallic tissue.

* Release a lymph-like transparent transudate when engorged.

* Release a lymph-like transparent transudate when engorged.