Major skill features Birdzilla Alexa skill offers the following features: 

• A user can get bird data, including the card with a bird’s image that is displayed in Alexa’s companion app or display enabled Echo devices.
•  A user can hear a bird’s song. The skill catches the context. 
• Once the bird data is read, a user can ask to play a bird’s song. 

During the development of Birdzilla skill for Amazon Alexa, we have developed and finalized our own SDK for PHP and Node.js. 

This is how a user receives the same experience with the skill as with the website: you can listen to a bird’s singing, hear a story about it and see how it looks in the companion app or on display enabled Echo device. 

To make Alexa produce a bird’s song, for conversion, we used ffmpeg - ffmpeg -i -ac 2 -codec:a libmp3lame -b:a 48k -ar 16000 .