The flora and fauna of the islands seem to be poorly investigated.
An exhaustive publication from 1995 tempting to list all the breeding sites of the snow petrel (Pagodroma nivea) in Antarctica mentions the Guébriant Islands as a possible breeding site, based on a single observation from 1962.
This may indicate not only that the observation from 1962 was sketchy, but also that there are no known written records of the islands' bird life in the 33 years thereafter.

The vegetation of the Guébriant Islands consists of moss patches of the genera Brachythecium, Bryum and Drepanocladus, among other things.
In these moss communities the most abundant nematodes (tiny roundworms) are from the genera Plectus and Aphenchoides.
In moss patches of Drepanocladus these worms may number 428,000 per square meter in just the uppermost 2.5 cm.

Alectoria minuscula f. biformis, a species of lichen, was found on the islands by B. Stonehouse and V.E. Fuchs on 13 October 1948 and was abundant at altitudes above 100 ft.
Another lichen species, of the genus Lecanora, was found on the leeward slope of the southern Guébriant island at an altitude of 61 metres in 1961.
The flora and fauna of the islands seem to be poorly investigated. An exhaustive publication from 1995 tempting to list all the breeding sites of the snow petrel (Pagodroma nivea) in Antarctica mentions the Guébriant Islands as a possible breeding site, based on a single observation from 1962. This may indicate not only that the observation from 1962 was sketchy, but also that there are no known written records of the islands' bird life in the 33 years thereafter.
The vegetation of the Guébriant Islands consists of moss patches of the genera Brachythecium, Bryum and Drepanocladus, among other things. In these moss communities the most abundant nematodes (tiny roundworms) are from the genera Plectus and Aphenchoides. In moss patches of Drepanocladus these worms may number 428,000 per square meter in just the uppermost 2.5 cm.
Alectoria minuscula f. biformis, a species of lichen, was found on the islands by B. Stonehouse and V.E. Fuchs on 13 October 1948 and was abundant at altitudes above 100 ft. Another lichen species, of the genus Lecanora, was found on the leeward slope of the southern Guébriant island at an altitude of 61 metres in 1961.
Guébriant Islands