First, the identification of newborn chicks:
1. Chicks hatched within 24 hours. For newly hatched chicks, sex is typically determined by examining the cloaca. This method has an accuracy rate of up to 99%. Under a 100W incandescent light, hold the chick with your left hand using your thumb, index finger, and middle finger, ensuring the chick's head faces downward. Gently press its back against your palm. With your right hand, use your index finger and thumb to gently open the cloaca. If the mucous membrane is yellow and there's a small protrusion in the center of the lower wall, it's a male. If the mucous membrane is dark black and no protrusion is visible, it's a female.
2. Chicks older than 24 hours. For chicks that are more than a day old, several physical and behavioral traits can help determine their sex. Males tend to make short, sharp "cicada-like" sounds, while females have softer, more muffled calls. Males also have swollen red gonads above the vent, which females do not. The feces of males often contain white, foamy material, while female droppings are dry and without foam. Male chicks also develop reddish-brown chest and cheek feathers, while females have grayish feathers with black spots. Males are usually more compact and lighter in weight, whereas females are larger and have a looser body structure.
Second, identifying Aberdeen (a type of pigeon):
1. At 3 weeks old. After the first molt, the feather patterns become more distinct. Males begin to show red-brown chest feathers with occasional black spots, while females remain more uniform in color. However, this method is less reliable and should be used alongside other indicators.
2. At one month old. By this time, the pigeons have fully replaced their down with adult feathers. Males display auburn coloration on the face, beak, and throat, with light red chest feathers and some black spots. Their abdomen is pale yellow, and their chest is broader. Some males may start making soft cooing sounds. Female Aberdeen pigeons have a yellow face, white-gray cheeks and throat, and a chest covered in dense, small black spots arranged in a heart-like pattern. Their abdomen is gray, and although some females may have similar chest colors to males, the color of their beak and throat helps distinguish them. Females also have softer, shorter coos compared to males.
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