If you haven't tried it their Merlin app is pretty fantastic.
And their eBird app! A masterpiece of design for a user base that they deeply understand. Something of a learning curve, but extremely efficient and useful for advanced / expert users.
Highly highly recommend. I use it at least once a week and have done so for several years. My daughter loves scrolling through all the local birds and playing the sounds they make.
It's Pokemon for old people, I love it and use it at least once a day. Personal best for a dog walk - 23 different birds, personal best for sitting in the garden drinking my morning coffee - 17 birds.
My family got a little tired of me using it on holiday in Portugal, but in my defence there were a lot of new birds I needed to add to my collection.
I've used Merlin for a while and I'm still impressed by Merlin's sound identification, it continues to inspire me.
I wrote about it last year: https://digitalseams.com/blog/what-birdsong-and-backends-can...