How do the digestive systems of mammals differ to birds? Given that most mammals and birds will eat the same thing, why would they evolve differently? - Quora
![Gastrointestinal tract in chickens and function. The beak gathers food;... | Download Scientific Diagram Gastrointestinal tract in chickens and function. The beak gathers food;... | Download Scientific Diagram](https://www.researchgate.net/publication/321799440/figure/fig1/AS:614133921742880@1523432345809/Gastrointestinal-tract-in-chickens-and-function-The-beak-gathers-food-the-bifurcated.png)
Gastrointestinal tract in chickens and function. The beak gathers food;... | Download Scientific Diagram
![Modified part of___________ is the gizzard of the grain eater birds. a)Oesophagusb)proventriculusc)true stomachd)small intestine Modified part of___________ is the gizzard of the grain eater birds. a)Oesophagusb)proventriculusc)true stomachd)small intestine](https://www.vedantu.com/question-sets/0cf0b726-8ae0-42e7-b3f9-27eb74cee1574159836397328286377.png)