Also, as far as telling the age of your Budgies...
In all Pied-mutation Budgies (as well as some hybrid mutations, but not going into Budgie genetics here, basically all Budgies who have a barred-forehead as babies), you can tell their age up to about 2 years old, sometimes a bit less, by the black barring on their foreheads, and how close it is to their Cere...As babies who have just grown-in their outer feathers, if they have a barred-forehead, the bars are actually touching their Ceres and are covering their entire foreheads...As they get closer and closer to hitting puberty (around a year-old, give or take a month or two), the barring on their foreheads recedes up and away from their Ceres, leaving bare forehead feathers in their place (their foreheads slowly become more and more solid in color, either white if they are white-faced, yellow if they are yellow-faced, or whatever color the rest of their head/face is depending on mutation)...After you breed/hand-raise or own several different Budgies from the time they first hatch or are very young babies forward, you develop the ability to tell the age of ones with barred-foreheads based on how far the bars have receded away from their Ceres/faces...
With Budgie mutations who do no have barred-foreheads, OR with Budgies who are a year and a half or older (give or take a month or two) and who's forehead-bars have already receded completely and left a solid forehead, then you have to use other visual cues to be able to get an ESTIMATE of their age, just the same as you have to do with pretty much all other parrot species who have gone through puberty and grown-in their adult feathering. These are the same visual cues that Certified Avian Vets/Avian Specialist Vets use to estimate the ages of birds/parrots who have been re-homed to/purchased by their new owner, or who are found outside, or in the situation where someone has purchased a parrot or a pair of parrots that were said to be "proven breeders" by their prior owners and who have stated them to be a certain age but who don't supply a Hatch-Certificate along with the birds...It's very common for people selling a "breeding-pair" of parrots to a new owner who is buying them strictly because they want to breed them (and who typically pay a fortune for a "proven-pair" of breeder parrots who must be within the age that they can still be bred) TO LIE COMPLETELY about the age of the birds, and the same thing happens all the time to people buying or paying a "re-homing fee" to someone who is re-homing their pet parrot/bird...They don't want to tell prospective new owners that their pet parrots are actually very old/elderly and only have a few years left, they want them to think that they are adopting/buying a parrot that will be their pet for decades! After-all, the reason a lot of people choose a parrot as their only pet in the first place is because they live very long lives in-comparison to dogs, cats, and most other pets (same reason people buy Sulcata Tortoises as little, tiny babies the size of a 50-cent piece, because they know they'll live to be between 80-100 years old and outlive them)...
So the bottom-line is there are other visual-cues that will allow a CAV/Avian Specialist to estimate a bird's age within a 5-10 year range...They include looking at their feathers/feather follicles, their skin, their eyes/ears, their beaks/toenails, etc. And if their owners will pay for it, a regular X-ray can really help to be much more accurate about a bird's age because you can see their bone-density, the size of certain internal organs, etc.
***So as far as telling how old your two Budgies are, it's impossible to do from photos, except for us to say that they are both at least a year-and-a-half old, probably both at least 2 years-old...That's about all we can tell you about their age...HOWEVER, if you take them to a Certified Avian Vet/Avian Specialist Vet for their yearly Wellness-Exam, ask them to try to estimate their age for you, and they should be able to give you a pretty close estimate... (no "Exotics" Vets for this, because they'd have no idea how to tell the age of a Budgie and most-likely tell you something that is totally false)
