Tony,
Thanks for your comments. In the second image, I was far away from the nests, and was using a Canon 60D with the 70-300 L lens. Also, I was at the edge of the cliff, so no chance of getting closer. I have tried to convey not so much the detail of the birds, but their precarious surroundings. The lighting was from close to sunset on the left, hence the lateral ligthing with a high contrast.
This time of the year, there are lots of stork nests in this area, and I have uploaded some more photos I did on that day. I am planning to go back in the early morning, with the lighting on my back.