Tomatoes, definitely bird damage. Usually they will go after tomatoes when they start to blush but once they have a taste for them and if there isn't anything sweeter, like papaya, they will go after green tomatoes. They are very fond of large tomatoes and chili peppers.
Birds will also eat lettuce leaves, they will peck them to nubs and pull seedlings out of the ground looking for worms.
They will also eat tender green and they would leave the tips of the stems, but other critters have a fancy for those things too. They are not the work of beetles which would look a lot different. Anything from rabbits, racoons, deer, and other critters have a taste for garden greenery. fencing and netting are the only solutions I know for that.
Here feral chickens will eat my lettuce seedlings and bulbuls will only leave caps on the Hawaiian chili, and I need to pick my tomatoes at first blush. Birds will also hollow out the sweetest papaya and they like to eat orchid flowers, especially phalaenopsis buds and catleya petals. Birds and snails will both go after strawberries and I have to get to the Brown Turkey figs before the birds do. Slugs ad snails do the most damage chewing off the tops of my seedlings and eating roots of plants. Doves will eat the pepper seeds from the pots so I have to put a cover on the seed tray so they can't get to them. Mongoose will dig holes in my garden if I bury green waste so I have to wait a couple of weeks to plant otherwise they dig up my plants too. The geckos love earthworms. When I dig up my garden to add amendments they are right there to pounce on any earthworms I happen to dig up. I use lights to deter the Chinese rose beetles and they are sometimes a problem but not much. They will leave the bean and rose leaves lacy and they eat the roses too. The geckos do have a taste for beetles so that does help.
After I cut my grass, the cattle egret swoops down to look for any worms, slugs, or grubs that have been exposed. They also like to eat geckos.