Fungus or avian pox (1 Viewer)

I live in Southern California, and this hummer showed up at my feeder about three weeks ago. He has a black bulbous growth on the tip of his beak. My only camera is a phone, and the best shots I could get were these.

He is feeding regularly, flying around the neighborhood, so I don't think his health is declining...

I clean my feeder regularly, use only sugar water, and have a lot of flowers around my patio that they like to sip from. He showed up with the bulb.

Anyone know what this is? Can this one infect the others through my feeder??? Thank you.

Hello eve', welcome to BF.
My understanding is both the avian pox virus and fungal infections can cause lesions or abnormalities on the bills. Most times the virus causing cauliflower like lesions closer to the base of the bill, but yours does resemble it. An article on hummingbird afflictions can be seen >here<

Avian pox can be contagious via feeders etc., but many sources indicate mosquitoes are the most common vector.
Nothing more can be done, than what you are already doing by keeping the feeder clean and the nectar fresh.