Kaempfer's tody-tyrant (Hemitriccus kaempferi) is a rare species of bird in the family Tyrannidae, the tyrant flycatchers.

[6][7][8] Kaempfer's tody-tyrant was known from a few localities in southeastern Brazil's Santa Catarina state.

It typically forages singly or in pairs and is not known to join mixed-species feeding flocks.

It was a partially concealed longish cup made mostly from moss with some grass and dead leaves.

The primary vocalization of Kaempfer's tody-tyrant is a "high-pitched, nasal, strident and raspy 'kuı´t-kuı´t' or 'kwit-kwit', sometimes given as 'kwit kwit-kwit kwit-kwit-kwit-kwit' ".

It has a "very small and severely fragmented range"; its estimated population of between 6000 and 12,000 mature individuals is believed to be decreasing.

The main threats for the species are apparently banana, rice and timber plantations and the urbanisation of the coastal plain.

[7] It is considered Vulnerable under Brazilian law[10] and is on the United States' Endangered Species List.