Bang Pu in Samut Prakan province, is reputed to be a good place for bird watching. We went there in February, and I packed all my long lenses with the aim of getting some good birds photos.
However, it did quite work out as expected. All the main mangrove area is a restricted area and one cannot get in. And the main pier, which was open to the public was over run by seagulls. But at least I got lots of photos of seagulls. There was a good seafood restaurant at the end of the pier.