Stubeanz started a very intresting thread in July 2015 - http://www.zoochat.com/38/multiple-zoo-visits-day-uk-419161/ . This is very helpfull for the UK and snowleopard has shown us what is possible in the USA but what about other countries ( the Netherlands, Belgium, Germany, Singapore and so on ) ? I normanly spend a lot of time at a single zoo but have done already quite a lot 2 zoos in one day and if I remember right 3 is my record ( Eckerförde, Gettorf and Kiel - Germany ). Thinking about the possibilities I guess it would be however very posible to visit 4 - 5 collection a day without difficulties. Alone in and around Breda and Tilburg there are 6 collections in a radius of 30 kilometers and one day I will try to visit them all in one day just to show I'm a REAL zoo-nerd ! Would like to know what your record is and which other zoo-hot-spots can provide more as 2 zoos a day.
Singapore has a nice collection of zoos and aquariums. They have three (Singapore Zoo, River Safari, and Night Safari) that are accessible by a single parking lot! As the Night Safari is obviously open late, it is definitely possible to hit all three in one day.
All those tiny bird parks between Karlsruhe and Darmstadt make it possible to 'do' ridiculous numbers of places in a day - seven, eight, nine.... They're mostly pretty basic, though. There's a great stretch of good places between Magdeburg and Halle: Bernburg, Aschersleben, Stassfurt (pretty poor), Schonebeck (excellent rodent collection) - on a long summer's day, with sensible opening times, these can easily be combined with either of the bigger places at either end, for a very enjoyable quintet. Lots and lots of 3 or 4 zoo days possible through Germany..... This summer I saw Decin (x2), Liberec, Zittau, Gorlitz (x2) in one day. Again: sensible opening hours (8.00 at Decin) and closing times (I think it was 7.00 at Gorlitz), pretty small places, didn't really have to rush: would have liked a little longer at Liberec, but saw pretty much everything and was sufficiently grumpy about the rudeness of the staff that I was quite glad to leave and head to the very small, pretty inconsequential, but very friendly Zittau.
