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This could be a useful metaphor for humans. We too sit wrapped in our security blanket seemingly oblivious to the ecological destruction just beyond our immedite attention. We've served and been served by our paradigm of 'more' for thoousands of generations and, like the pelicans, have become glued to our worldview. The pelicans have the ability to fly away and live to have more eggs in a better place one day but instead sit on their nests trapped by a net woven of their past success and their inability to forsee the logical outcome of the events surrounding them.
The forces of ecological and enviromental destruction caused by human consumption encircle us just as the oil slick encircles the pelicans. We deny the obvious because it suits our immediate wants, our short term convienence and comfort and because it's worked to do this in the past. Both the pelicans and the humans are blind to the outcome of their short-term success.