@PSO Would you care to supply some qualifications for your claims are you just going to keep stating that Southwick is better and other zoos are inferior without actually providing evidence?
Baby animals being able to freely escape their enclosure is objectively bad husbandry/exhibitry whether it's sentimental to you or not. Same for birds on a stick, which is more than just an eyesore. Yes many zoos still have flightless parrots in older birds which were clipped in days gone by, but Southwick's multiple parrot stick displays and variety of species rather suggests that they're still part of the problem. Southwick never owned their own elephants afaik but I'm pretty sure renting elephants to use for riding still counts as exploitation. As for the felids, I'm referring to their animals such as tigers, Leopard, and Cheetahs which appear out of thin air from "unknown" facilities and are treated as though they are genuinely endangered taxa (ie Bengal for the generic tigers and African for the generic Leopard) partaking in captive programs. In line with this, if you pay attention to the signage, they routinely label animals as being rarer versions of what they actually keep (ie their generic sika labeled as Formosan; Common Squirrel Monkey labeled as Bolivian), regularly provide range maps that are completely incorrect for the taxa they lists, and write off bad husbandry such as animals being able to escape enclosures as being good for them.
No idea where your claim that most zoos, especially accredited ones, lack a house vet or head educator because this is not true. Most accredited zoos have their own separate vet and education buildings. RWPZ and Beardsley both do for the record.
Beardsley is better than Southwick. The latter may be larger and have more odd species, but as discussed in detail already their husbandry is substandard at best for most of them. Additionally, how much conservation work does Southwick do exactly? Beardsley partakes in a lot of local conservation such as yearly monitoring of CT amphibian populations, the spay/neutering of feral cats, and the reintroduction the captive-raised Brook Trout into wild streams. On the lines of reintroduction, the zoo has also sent Red Wolves, Golden Lion Tamarins, and even their old pair of Andean Condors to join wild reintroduction projects. The zoo also partakes in genuine captive breeding programs for a wide variety of endangered species managed within AZA zoos. This includes Amur Tigers, Amur Leopards, Maned Wolves, Red Wolves, Brazilian Ocelot, Chacoan Peccaries, Giant Anteaters, Golden Lion Tamarins, Goeldi's Monkeys, etc. Meanwhile Southwick pretends they are keeping/breeding endangered species like their generic sikas, tigers, giraffes, etc. I will admit, many zoos keeping generic giraffes act as though they keep an endangered taxa, but as far as New England zoos go the other two holding giraffes both keep the actually endangered animal. I'm not sure if the zoo is actually part of the AZA program for Schmidt's Guenon or Black-Crested Mangabey or not, but these would be welcome exceptions if so.
To answer your last question, unlike Southwick, FPZ's tigers are rescues and they are signed as such.
And for the record, Aldabra Giant Tortoises can be purchased from the pet trade.
~Thylo