During puberty: After infancy, the tween and teen years are the period of most rapid change. For girls, the growth spurt begins between 10 and 11 and lasts until around 15; for boys, it starts about two years later and lasts until age 17 or so. Girls typically stop growing about three years after they've had their first period, but boys continue to grow throughout their teens.
Parrots have thick tongues, so they don't need lips to approximate human sounds. The tongue's thickness, and where a parrot positions it in his mouth, allows him to imitate human speech. When air passes through the syrinx, the parrot moves his tongue to produce sound in his throat and mouth.
It can be hard for novice bird owners to understand -- one day your parrot is a sweet, tame, happy member of your family, and the next he or she is acting like a vicious little monster! The most common reason for these sort of personality changes is that your bird is going through a hormonal period due to mating season.Read on to discover some of the most common signs of hormonal behavior in birds, and how to cope until your pet's behavior subsides.t can be hard for novice bird owners to understand -- one day your parrot is a sweet, tame, happy member of your family, and the next he or she is acting like a vicious little monster! The most common reason for these sort of personality changes is that your bird is going through a hormonal period due to mating season.