UK's Top 20 Largest Zoological Collections 2024

Kalaw

Well-Known Member
Out of curiosity, I looked at what the top 20 largest zoological collections in the UK were in terms of species list according to Zootierliste. By a nice coincidence, the date in which I checked this was the 31st of January, which opened the possibility of (again using ZTL) creating a new such list on the same date every year, to see what has changed over the past year. Not quite sure if one year is sufficient enough time to see any interesting change, but it could reveal something interesting.

Of course, using ZTL has its flaws. It doesn't list invertebrates, which hinders aquariums with their extensive collections of corals, anemones and crustaceans among other marine invertebrates, zoos with large invertebrate houses (such as London), and specialist invertebrate zoos (such as the Bug Parc, which may have a large enough collection to make the list). It also is entirely reliant on visitors to said collections updating it, which inevitably leads to mistakes, but hopefully most of these are minor and don't have too much of an impact on the overall result.

On that note, the top 20 is as follows:
  1. Chester Zoo - 424 species
  2. Blue Planet Aquarium (Ellesmere Port) - 275 species
  3. Cotswold Wildlife Park (Burford) - 250 species
  4. Blue Reef Aquarium Hastings - 246 species
  5. National Marine Aquarium (Plymouth) - 232 species
  6. Paignton Zoo - 227 species
  7. ZSL London Zoo - 221 species
  8. ZSL Whipsnade Zoo (Dunstable) - 217 species
  9. Exmoor Zoo (Bratton Fleming) - 184 species
  10. WWT Slimbridge Wetlands Centre - 183 species
    Birdworld (Farnham) - 183 species
  11. Blackpool Zoo - 181 species
  12. The Deep Aquarium (Hull) - 178 species
    Dudley Zoo - 178 species
  13. Tropiquaria Zoo (Washford) - 175 species
    Wingham Wildlife Park - 175 species
  14. Colchester Zoo - 165 species
  15. Hamerton Zoo - 160 species
  16. Sea Life London - 158 species
  17. Oceanarium Bournemouth - 152 species
    Bristol Aquarium - 152 species
  18. Hoo Zoo (Telford) - 149 species
  19. Axe Valley Wildlife Park (Axeminster) - 147 species
  20. Tilgate Nature Centre (Crawley) - 145 species
Asides from the number one spot (and maybe number two), I don't think I would have predicted any of this correctly. I had heard of Tilgate Nature Centre, but knew nothing about it, and wouldn't have suspected it came close to the 100 species mark, and similar remarks can be made about Bristol Aquarium. In general, the sheer number of aquaria on this list was a shock, particularly with the exclusion of marine invertebrates - Blue Planet, Plymouth and the Deep were obvious, but Bournemouth, SL London and Hastings less so, and the fact that the latter exceeds both ZSL collections and Paignton was a massive shock. Tropiquaria also surprised me - I visited many years ago, and don't remember it having all too remarkable of a collection, never mind one bigger than Colchester and Hamerton, as is the case with Slimbridge, although that is somewhat more believable. What is most incredible is that the top two are just two miles away from each other, and have nearly 700 species between them!

It is also interesting how area and species collection have no correlation. Excluding aquariums, which feel like cheating being all indoors, there are four collections (Exmoor, Axe Valley, Tilgate and Tropiquaria) that are under 15 acres, with Tropiquaria even being as small as 4. Meanwhile, 500 acre giants such as Knowsley and Port Lympne are nowhere to be seen.
 
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Thanks for posting the list as it makes for interesting reading. It would be great to see it broken down even further, into various lists of mammals, birds, reptiles and amphibians. There might well be some surprises! For example, Colchester Zoo is ranked 14th in total species, but that's a mammal-heavy zoo and so I suspect that for mammals then Colchester would zoom upwards into the top 5 establishments. And which zoos would be near the top for reptiles? I'd be fascinated to find out. :)
 
Certainly when I went last year, the Bug Parc had 201 species on-display which would put it up into ninth place. A very impressive collection, considering it is spread across just three fairly small buildings.
That is indeed phenomenal for an all-invertebrate collection, although of course ninth place is assuming that some aquariums placed below it don't also receive a boost once invertebrates are factored in. ;)
Slimbridge are minus 50+ species as ZTL has too many species no longer in the collection
Interesting, thanks for bringing this up. If you don't mind me asking, however, it would probably be worthwhile moving some of these listings to former holdings in order to keep ZTL up to date - alternatively, if you can remember what they are, you could inform me of them in a PM and I will update them for you. Absolutely fine if not, but it is worth keeping ZTL up to date. :)
Thanks for posting the list as it makes for interesting reading. It would be great to see it broken down even further, into various lists of mammals, birds, reptiles and amphibians. There might well be some surprises! For example, Colchester Zoo is ranked 14th in total species, but that's a mammal-heavy zoo and so I suspect that for mammals then Colchester would zoom upwards into the top 5 establishments. And which zoos would be near the top for reptiles? I'd be fascinated to find out. :)
An excellent idea - if I have enough time, I will start working on that soon and will hopefully have it up by tomorrow! :p
 
  1. Chester Zoo - 424 species
  2. Blue Planet Aquarium (Ellesmere Port) - 275 species

Worth noting for anyone not familiar with the geography - this would mean if Zootierliste's numbers are taken as accurate then the UK's two most-speciose animal collections are two unrelated operations only 4 miles apart.
 
It would be great to see it broken down even further, into various lists of mammals, birds, reptiles and amphibians. There might well be some surprises! For example, Colchester Zoo is ranked 14th in total species, but that's a mammal-heavy zoo and so I suspect that for mammals then Colchester would zoom upwards into the top 5 establishments. And which zoos would be near the top for reptiles? I'd be fascinated to find out. :)
An excellent idea - if I have enough time, I will start working on that soon and will hopefully have it up by tomorrow! :p
The thread alluded to in the above post is now out for those who are interested:

UK's Largest Collections By Taxonomic Group
 
I don't think a bald list of "the most species" means much, and being surprised that aquariums have more species than typical zoos seems odd because it should be obvious. ZTL figures aren't exactly reliable for UK zoos anyway. Tropiquaria was expressed as being surprisingly higher in species total than Hamerton, but half of their species are fish which are mostly kept in a basement - see this review which has a total of "only" 117 species (Tropiquaria Review - October 2022 [Tropiquaria]). It's pretty easy to have a higher species total in your own house than a large zoo's total if it is aquarium fish.
 
@Chlidonias On my visit to Tropiquaria I saw 120 species. I only listed the species I saw in my review so a number of the tarantula and other species were missing from this. Fish signage as usual was awful and I didn't see all the splitfin species they have BTS so this is certainly not a complete list by any means.
 
How do these numbers stack up with those on the continent? Great work by the way.
 
Its difficult to find out exactly which species they have lost- ZTL can be rather outdated or innaccurate sometimes. I asked Slimbridge if they have a list of species currently held but didn't receive a reply so far on that.
Sadly the days when Wildfowl Trust members received an Annual Report that listed every species, at each of the Wildfowl Trust sites, are long since gone.....
 
By sheer number of species, I can think of a couple of aquarium/reptile retailers that might make the top 30!
 
Your initial list is missing Five Sisters (168 "species" by your criteria of including domestics):)
Is FSZ's inventory even accurate? They don't seem like a major zoo and yet they have even more species than Edinburgh, Blair Drummond and the other Scottish zoos combined.
 
On my visit in November, Tilgate certainly did not have 145 species, I think zootierliste may be quite outdaded for their inventory. Still a lovely place though:)
 
Is FSZ's inventory even accurate? They don't seem like a major zoo and yet they have even more species than Edinburgh, Blair Drummond and the other Scottish zoos combined.
Their website claims that they are home to over 160 animal species, so 168 is certainly likely - naturally ZTL isn't always accurate, but in this case I think it is.
 
Amazing to see Cotswold so high on the list. You would not think it walking round the place!
 
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