“Benché certi dinosauri abbiano trascorso del tempo mangiando nell'acqua come fanno gli alci o i gatti viverrini, al massimo solo pochi tra essi sono diventati veramente acquatici allo stesso modo degli ippopotami, o marini come nel caso delle foche e delle balene. Gli unici dinosauri fortemente acquatici sono alcuni uccelli. Perciò, la solita diceria secondo cui sarebbero esistiti dinosauri marini è scorretta – queste creature dei mari mesozoici erano varie forme di rettili che si evolsero poi nel corso dei millenni.”
The Princeton Field Guide to Dinosaurs
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Although of modest size, this creature was one of the most unusual of all dinosaurs and provides entirely new insight on the classification of predaceous dinosaurs and on the surprisingly sophisticated capabilities possessed by some theropods.
Osteology of Deinonychus antirrhopus...

The dinosaur world I grew up in was classical. They were universally seen as scaley herps that inhabited the immobile continents. There was no hint that birds were their direct descendents. Being reptiles, dinosaurs were cold-blooded and rather sluggish except perhaps for the smaller more bird-like examples. They all dragged their tails. Forelimbs were often sprawling. Leg muscles were slender in the reptilian manner. Intellectual capacity was minimal, as were social activity and parenting... Hadrosaurs and especially sauropods were dinosaurian hippos, the latter perhaps too titanic to even emerge on land, and if they did so were limited by their bulk to lifting one foot of the ground at a time. Suitable only for the lush, warm and sunny tropical climate that enveloped the world from pole to pole before the Cenozoic, a cooling climate and new mountain chains did the obsolete archosaurs in, leaving only the crocodilians. Dinosaurs and the bat-winged pterosaurs were merely an evolutionary interlude, a period of geo-biological stasis before things got really interesting with the rise of the energetic and quick witted birds and especially mammals, leading with inexorable progress to the apex of natural selection: Man. It was pretty much all wrong. Deep down I sensed something was not quite right. Illustrating dinosaurs I found them to be much more reminiscent of birds and mammals than of the reptiles they were supposed to be. I was primed for a new view.
Autobiography

The dinosaurs are not extinct. The colorful and successful diversity of the living birds is a continuing expression of basic dinosaur biology.
Dinosaur Renaissance

Origine: Dalla trasmissione televisiva Il Pianeta dei Dinosauri, episodio 1.1: I primi dinosauri, Rai 1, 1993.

When I was a boy, I remember the other kids called them "dinosaur-birds", but they were neither dinosaurs or birds. The first problem is that most people don't know any more about the fossil record than what they've seen in a few plastic pieces in a prehistoric playset. Not only do they typically think that all these things are dinosaurs, they might even think that these are all the fossil forms that are known. They have no idea how rich the fossil record is.
Origine: Da Pterosaurs are Terrible Lizards https://www.youtube.com/watch?v=3_htQ8HJ1cA, YouTube, 3 dicembre 2013

Origine: Dalla trasmissione televisiva Il Pianeta dei Dinosauri, episodio 1: I primi dinosauri, Rai 1, 1993.

I do not believe birds deserve to be put in a taxonomic class separate from dinosaurs.
Dinosaur Renaissance