Birds, unlike humans but like fish, amphibians and reptiles, have four types of ... the ability to perceive not only the visible range but also the ultraviolet part of the ... of colour detectors, but a high density of rod cells which function well in poor light. .... The main structures of the bird eye are similar to those of other vertebrates.

They both have digestive systems which end up with a structure called the cloaca, in which the waste product (uric acid) exits the body.  No need for separate liquid and solids, its a semi-solid waste, all-in-one.  They both lay eggs (except for the live birth species of fish).