I haven't posted on this thread in
24 days and so it is time for an update!
Thanks very much
@KevinB for your excellent advice and I'm definitely up for meeting anyone on my big European trip. I appreciate the input that I've received on this thread, as well as from several other zoo nerds via private messages and emails. On all of my 8 USA zoo trips, as well as when I visited 14 zoos in Australia in 2007, I planned everything myself with basically zero help from anyone. This time around, on what is really my 10th zoo trip and final one for a few years, I've been grateful to read about recommendations for my journey.
Thanks for the advice
@Arek and does this day in Belgium look good?:
Serpentarium Blankenberge (Blankenberge, BE) 10-11
drive 10 minutes
Sea Life Blankenberge (Blankenberge, BE) 11:30-12:30
drive 30 minutes
Aquarium de la Mer du Nord (Ostend, BE) 1-2
drive 30 minutes
NAVIGO – National Fisheries Museum (Oostduinkerke, BE) 2:30-3:30
drive 45 minutes
Boudewijn Seapark (Bruges, BE) 4:30-6
Of course it will not take me a full hour to visit the Sea Life Aquarium, or even close to an hour to visit the Aquarium in Ostend, but when I plan my itinerary I have to allow for a little bit of extra time to grab a quick lunch somewhere, or to find parking, or to navigate a traffic jam, etc. Aside from any disasters, visiting 4-5 small places on several days of the trip should be remarkably easy and I'd honestly add on even more zoos if they had late-night hours. The big zoos on this Euro trek are obviously going to be the highlights but there is something wonderful about visiting several obscure zoos that most people have never even heard of and I take great delight in doing just that.
On a separate note, I've been talking things over with my wife far more than I've ever done on my past zoo trips. She is really urging me to go for longer in 2019 because the plan is to then not have any zoo trips in 2020 or even 2021 and therefore not again until 2022. These big summer journeys are expensive every year! So...I've got a new rough draft that sees a reworking of some of the days that I posted earlier, plus the inclusion of an extra week onto the trip. When someone looks at the entire experience then it seems crazy and immense, but by breaking it down into separate days then my plans are totally feasible and it all makes sense.
I'm not going to post an updated full itinerary at this point, but the latest plan has me visiting 47 Dutch zoos, 12 Belgian zoos and at least 25 German zoos. If I have to miss a few small places due to traffic congestion then that will be no big deal and the 'butterfly-greenhouse zoos' will be the first to go.

I'll be gone for 30-31 days and will visit perhaps 85 zoos in total...depending on future changes that I make to my plans. I'll depart Vancouver Airport on approximately July 15th, 2019, and leave Amsterdam Airport on approximately August 14th, 2019 to return home.
The additions are mainly German zoos that are near the Dutch/Belgian border: Cologne, Wuppertal, Dortmund, Gelsenkirchen, Duisburg, Krefeld, Aquazoo Lobbecke in Dusseldorf and a handful of smaller German zoos in the south. I'm still toying with the notion of adding on Frankfurt and/or Opel Zoo in Kronberg. For example, it would be possible to spend 5.5 hours at Frankfurt Zoo, a facility with several animal houses but small acreage, drive to Kronberg and then still have a full 4 hours at that zoo. Or even 6 hours at Frankfurt and 3.5 at Opel. (Just one of countless items to consider when rearranging such a vast itinerary as both of those zoos have 9:00-7:00 hours and are open later than most places...and Opel Zoo has a fairly new, impressive-looking elephant exhibit)
Slightly more to the north, I've added in German zoos such as Osnabruck, Rheine, Munster, Hannover, Nordhorn and a few minor facilities such as zoos in Bielefeld and Gronau as they both have early opening hours and will be easy to visit at the crack of dawn before I start my day.
Stay tuned!