Wow I dont think that is big for a lovebird. I usually hear they way about 50 grams. I wonder if the vet would say this is the case with other species....females being bigger. Because my female plet is bigger than my male but my two female linnie and budgie are very petite for their species.She weighed 44g when he was weighed at the vets. Right now I weighed him on my scale and she weighs 47g. Will weigh him weekly to see as she is just a baby.
Interesting! I wonder if that also applies to other species as well. I have noticed with lovebirds and plets but especially lovebirds that the females have a squattier stance than males. That is what I noticed with this one in the picture. I think weight could be a variable at this point because it could have been starving out there....maybe that is why the weight is on the lower side. The stance looks female tho. Hard to tell without seeing it in person. In some species they say males have bigger heads, eyes, and beaks, I have seen that to be true as well but usually only if you have a male and female side by side. This is true with my plets even tho the female weighs more, the male has a larger head and beak.Indeed, from all the information I've got (including an actual book on lovebirds I bought right after getting my first lovie) as well as my actual experience with my lovebird flock (6 lovies), I can say that female lovebirds are in fact bigger in size than the males.
And this goes for all the 3 main species (Fischer's, Peach faced, and black masked). In the Peach face variety, the birds of both genders are even bigger in size than their eyering species "cousins", the Fischer's and Black masked lovebirds.