Reserva Ecológica Costanera Sur

Sitio realizado por aficionados a la observación de aves desde 10 de enero 2006

Other Vertebrates

Amphibians are a group of cold-blooded vertebrates. They go through metamorphosis after hatching. They change from gill-breathing (completely water-depending) like fish to lung-breathing (living mainly on land). They hibernate during winter.They are considered ecological indicators. Their presence indicates lack of pollutants in the environment.There is only one order registered here - Anura (toads and frogs).Main differences between frogs and toads for identification.Frogs have smooth skin and longer hind legs adapted for leaping.Toads are bulky and have warty skin. Their hind legs are short (for walking not for leaping)
Rana enanaDwarf frog
Pseudopaludicola falcipes
Rana criollaSpotted Thin-toed Frog
Leptodactylus latrans
Sapo comunCommon Toad
Rhinella arenarum
Sapito cavador/Bella Vista ToadBella Vista Toad
Rhinella fernandezae
Ranita acuática común/Lesser Swimming FrogLesser swimming frog
Pseudis minutus
Rana roncadora/Snoring frogSnoring frog
Scinax granulatus

Mammals are a class of warm-blooded vertebrates. They possess hair and mammary glands, which produce milk to feed the young. They are viviparous, that is, the embryo develops inside the body of the mother. The degree of maturity at birth differentiates three subclasses (monotremes, placentals and marsupials). Placentals are nourished in the mother's uterus through the placenta. Young are born live and do not take long to fend for themselves. Though most placentals are difficult to see during the day, coypus and guinea pigs may be the exceptions. Marsupials, instead, have no true placenta, therefore the embryo has to obtain nutrients somehow. As they leave the uterus they present an uneven development. Hind legs and facial parts are more developed than other parts of the body. By using the hind legs they will crawl to the nipple where they will remain attached to until they complete development.
VizcachaPlains Viscacha
Lagostomus maximus
CuisBrazilian Guinea Pig
Cavia aperea
Myocastor coypus
ColilargoYellow Pygmy Rice Rat
Oligoryzomys flavescens
Rata de pantano/Holochilus sp.Marsh rat
Holochilus sp.
Murciélago escarchadoHoary Bat
Lasiurus cinereus
Lobito marino de dos pelos sudamericano/South American Fur SealSouth American Fur Seal
Arctocephalus australis
ratón-casero4-JST-7-13House mouse
Mus musculus
Eumops bonariensisPeters's Mastiff Bat
Eumops bonariensis
ComadrejaThick-tailed Oppossum
Lutreolina crassicaudata
Comadreja overa/White-eared opossumWhite-eared Opossum
Didelphis albiventris
Comadrejita ágil/Agile gracile OpossumAgile gracile Opossum
Cryptonanus chacoensis

Turtles belong into the order of reptiles. They are characterised by a protective shield which allows only head, legs and tail to be seen through two openings, one at the front and the other at the back. In case of threat these parts may also disappear in the inside. The shield consists of two shells -carapace and plastron, upper lower parts respectively- joined together at the sides by bony structures.Turtles are classified according to the way they withdraw their head into their shells. Side-necked turtles or Pleurodira fold their long neck laterally between the carapace and plastron leaving the head and neck partially exposed. They are only found in the Southern Hemisphere. Hidden-necked turtles or Cryptodira pull their heads back into the shell with vertebrae adopting an S form in the inside. Both groups are represented at Costanera.The four registered species (three are native and one is exotic) live in the ponds. Webbed feet, limbs rather flattened and a streamlined carapace are the adaptations to aquatic life. Though they spend most of their time in water they lay eggs on land. Females dig a hole where eggs are buried and left unattended.
Tortuga cuello de serpienteSnake-necked Turtle
Hydromedusa tectifera
Tortuga de lagunaSide-necked Turtle
Phrynops hilarii
Tortuga de orejas rojasRed-eared Turtle
Trachemys scripta elegans
Tortuga pintadaPainted Turtle
Trachemys dorbignyi
Tortuga mordedora/Common snapping turtleCommon snapping turtle
Chelydra serpentina

Reptiles escamosos
They are so called because their body is covered with horny scales. They are divided in three suborders quite different in appearance: lizards, snakes and worm lizards. All of them are represented at Costanera.

Lizards have four short legs adapted to locomotion. The long tail can be shed and regenerated. The mandibles are not mobile. On the contrary, the eyelids are.

Lagarto overoBlack-and-white Tegu Lizard
Salvator merianae
Lagarto coloradoRed Tegu Lizard
Salvator rufescens
Lagartija de las cortaderasMabuya
Aspronema dorsivittatum
Lagarto trpador chaqueño/Etheridge's Lava LizardEtheridge's Lava Lizard
Tropidurus etheridgei
Gecko/Common Wall GeckoCommon Wall Gecko
Tarentola mauritanica

Snakes have no limbs, so they crawl. They have elongated body and tail. Mandibles are joined by ligaments. This gives great bite mobility allowing the passage of big pieces through them. They have no mobile eyelids; only a fixed and transparent eyelid covers the eye. Snakes may be venomous or non-venomous. Some traits may help us to tell them apart. Unfortunately they are not always foolproof. So it is wise to keep away from them in case of doubt.a) Non-venomous snakes have big scales covering their heads. Venemous snakes have small scales.b) Non-venomous snakes have big eyes and round pupils. Venomous snakes have smaller eyes and elliptical pupils like the cat’s eye.c) Non-venomous snakes have rounded heads. Venomous snakes have spear-like heads.

Culebra ratoneraBrown mussurana
Paraphimophis rustica
Culebra pardaWater Snake
Erythrolamprus semiaureus
Culebra ojo de gato/Sand Coastal HousesnakeSand Coastal Housesnake
Thamnodynastes hypoconia
Culebra ocráceaTree Coastal Housesnake
Thamnodynastes strigatus
YararáUrutu Pit Viper
Bothrops alternatus
Culebra acuática común/Colubroidean SnakeColubroidean snake
Helicops infrataeniatus
Culebra acuática overa/Colubroidean snakeColubroidean snake
Helicops leopardinus

Worm Lizards
Worm lizards are adapted to underground life. They have an elongated cylinder-like body and are limbless, but for one species. Scales arrange in rings. So, worm lizards move in an accordion-like way and can do it forwards or in reverse indistinctly. It has atrophied eyes. Tail and head are quite similar in form and almost indistinguishable.

Viborita ciegaWorm Lizard
Amphisbaena sp.


Collaborating in fish species identification
Guille SpajicGuillermo Iván SpajicPassionate about fish, keen nature observer and sport fisherman.Founding partner and member of the Directive Committee of AAPS (Argentine Assoication of Bait and Fly Fishing). This entity has the primary goal of preserving fish species and responsible fishing. Member of COA Carancho (Club de Observadores de Aves de Palermo - Birdwatchers' Club)Former teacher at the Fishing School for Kids of the Club de Pescadores de Buenos Aires.I run "Pesca en Streaming", a radio program oriented to spread responsible fishing and issues related to nature and conservation.

Fish are aquatic vertebrate animals which are characterized by having most of them scales, fins and gills, which allow them to get the oxigen from water. They are ectothermic, that is cold-blooded, their temperature varies according to ambient temperature.
Anguila criolla/Marbled Swamp ee-Marbled swamp eel
Synbranchus marmoratus
Cnesterodon decemmaculatus
Astyanax sp.
loricáridoCatfishesFlia Loricariidae
garza mora JST (2)Long-whiskered Catfish
Pimelodus maculatus
Porteñito/CatfishLong-whiskered Catfish
Parapimelodus valenciennis
Armado común/Granulated CatfishGranulated Catfish
Pterodas granulosus
Palometa/Speckled PiranhaSpeckled Piranha
Serrasalmus spilopleura
Sábalo/Streaked ProchilidShad
Prochilodus lineatus
Macá grande/Great GrebePike characin
Oligosarcus jenynsii