Interesting series of photos. Wasn't even aware of this park before your uploads. Though kept several places, actual breeding colonies of gannets aren't exactly commonplace in zoos -- as I'm sure you already knew.
I've seen a thriving breeding colony of gannets in a Dutch zoo back in the 80s, can't remember where, though. Then of course there was Mr Booth in Brighton, who bred them in his back garden in the 19th century. Could it be that they are actually surprisingly good captive subjects, and the few collections that keep a group [as opposed to one or two] end up breeding them?
Artis Amsterdam has bred them with some regularity and I´m not sure about Burgers but I realy don´t think they are easy to breed even if you have a nice group of them !
Westkuestenpark by the way claims to hav Germans largest colony and seems to breed them every year.
I don't know if northern gannets are easy or difficult to breed, but there's only a handful of zoos worldwide with breeding colonies. Most are in Germany.
(Now we just need a zoo to establish breeding colonies of the related blue-footed, red-footed and Nazca boobies..... would fit perfectly in a big Galapagos exhibit with the penguin, flightless cormorant, swallow-tailed gull and marine iguana )
