Author: ΓΕΡΟΓΙΑΝΝΗΣ ΔΗΜΗΤΡΙΟΣ

Ο πλατύποδας ή ορνιθόρυγχος  είναι ημιυδρόβιο θηλαστικό ενδημικό στην ανατολική Αυστραλία, συμπεριλαμβανομένης και της Τασμανίας. Μαζί με τα τέσσερα υπάρχοντα είδη έχιδνας αποτελούν τα πέντε είδη μονοτρημάτων που είναι τα μόνα θηλαστικά που γεννούν αυγά αντί για νεογνά. Είναι ο μοναδικός επιζών αντιπρόσωπος της οικογένειάς του και του γένους του. Συγγενή είδη έχουν βρεθεί σε έναν αριθμό απολιθωμάτων. Έχει μήκος μέχρι 60 εκατοστά.

Η περίεργη εμφάνιση αυτού του ωοτόκου, δηλητηριώδους, θηλαστικού με ράμφος που θυμίζει αυτό της πάπιας, ουρά σαν του κάστορα και πόδια σαν αυτά της βίδρας, ξάφνιασε τόσο του Ευρωπαίους φυσιοδίφες όταν το συνάντησαν για πρώτη φορά, ώστε κάποιοι το θεώρησαν ως μια περίτεχνη απάτη. Απασχόλησε τον Δαρβίνο σχετικά με την θεωρία της εξέλιξης. Πιστεύεται ότι αποτελεί τον μεταβατικό κρίκο από τα ωοτόκα ζώα στα θηλαστικά. Είναι ένα από τα λίγα δηλητηριώδη θηλαστικά. Ο αρσενικός πλατύπους έχει ένα κεντρί στο πίσω πόδι του που μπορεί να διοχετεύσει δηλητήριο ικανό να προκαλέσει έντονο πόνο στους ανθρώπους.

999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999