The Bee Gees: Northern carmine bee-eater, White-fronted bee-eater and European bee-eater

From left to right: Northern carmine bee-eater (Merops nubicus), White-fronted bee-eater (Merops bullockoides) and European bee-eater (Merops apiaster).
Free-roaming in the tropical hall.

Olmen is the only European zoo to keep more than two bee-eater species together in one exhibit.

Because I feel like pictures of free-flying birds are always much better with a list of what all else roams freely throughout the hall, I decided I'd try and whip up a list!
Note: I've only ever visited the Olmense zoo twice, so there may or may not be a few mistakes. Here goes:

List of free-roaming species in the Tropenhal, as of 20/07/2017:
Non-passerine:
California quail, Callipepla californica
Crested wood-partridge, Rollulus rouloul (?)

Ringed teal, Callonetta leucophrys

Buffon's turaco, Tauraco persa buffoni

Crested dove, Ocyphaps lophotes
Laughing dove, Streptopelia senegalensis
Speckled pigeon, Columba guinea

Northern masked lapwing, Vanellus miles
Chilean lapwing, Vanellus chilensis
Hybrid lapwing, V. miles x V. chilensis

Scarlet ibis, Eudocimus ruber
Little bittern, Ixobrychus minutus

Speckled mousebird, Colius striatus

Brown-hooded kingfisher, Halcyon albiventris
Northern carmine bee-eater, Merops nubicus
White-fronted bee-eater, Merops bullockoides
European bee-eater, Merops apiaster

Passerine:
Asian azure-winged magpie, Cyanopica cyanus

Red-billed leiothrix, Leiothrix lutea

Bank myna, Acridotheres ginginianus
Silky starling, Poliopsar sericeus
Red-winged starling, Onychognathus morio
European starling, Sturnus vulgaris (probably a wild bird that got in)
Long-tailed glossy starling, Lamprotornis caudatus
Greater blue-eared glossy starling, Lamprotornis chalybaeus
Golden-breasted starling, Lamprotornis regius
Superb starling, Lamprotornis superbus

Southern red bishop, Euplectes orix
Yellow-crowned bishop, Euplectes afer
Western village weaver, Ploceus cucullatus cucullatus
White-headed buffalo weaver, Dinemellia dinemelli (?)
Red-headed quelea, Quelea erythrops (?)

Sahel paradise-whydah, Vidua orientalis
Pin-tailed whydah, Vidua macroura

Java sparrow, Padda oryzivora

Red-crested cardinal, Paroaria coronata (?)

Domestic canary, Serinus canaria f. domestica

(?) = Unseen by me, unsigned by the zoo, and no recent mentions of it on ztl.
Not counting the questionable ones, that's 33 bird species in one hall.

I love the idea of a bee-eater walk-through. They are such graceful birds in flight.