I'm new to this so please bear with me... recently we got three ducklings from my partner's school - they're all entirely jet black but as they've aged they have started to show yellow/paler colouration on their fronts.
If anyone could please identify them (I've attached the best pictures I could get) I would be SO grateful! If anyone could also have a guess at how old they are that would also be amazing! the school has passed no information about them onto us!
Thank you in advance for any help! x