Merops Apiaster

I saw this strange bird on the sky, I realised it was a Merops Apiaster (European Bee-eater). The fly really high and they seem like a big swallow, but with a lighter color. This bird produces a high, distinctive sound. I knew what type of nest they make: Holes in dry dirt.
I went on a walk to find the nest, wich i did. I found a hole in wall of dry dirt. I set up a tent and slightly opened the door. Then I  waited. The birds started calling and its offspring were also peeping. The beautiful bird came to the hole several times to feed the offspring. This was in Arrábida. Here's what I got: