TITLE 18 - US CODE - CHAPTER 3 - ANIMALS, BIRDS, FISH, AND PLANTS

18 USC 41 - Hunting, fishing, trapping; disturbance or injury on wildlife refuges

Whoever, except in compliance with rules and regulations promulgated by authority of law, hunts, traps, captures, willfully disturbs or kills any bird, fish, or wild animal of any kind whatever, or takes or destroys the eggs or nest of any such bird or fish, on any lands or waters which are set apart or reserved as sanctuaries, refuges or breeding grounds for such birds, fish, or animals under any law of the United States or willfully injures, molests, or destroys any property of the United States on any such lands or waters, shall be fined under this title or imprisoned not more than six months, or both.

18 USC 42 - Importation or shipment of injurious mammals, birds, fish (including mollusks and crustacea), amphibia, and reptiles; permits, specimens for museums; regulations

(a) 
(1) The importation into the United States, any territory of the United States, the District of Columbia, the Commonwealth of Puerto Rico, or any possession of the United States, or any shipment between the continental United States, the District of Columbia, Hawaii, the Commonwealth of Puerto Rico, or any possession of the United States, of the mongoose of the species Herpestes auropunctatus; of the species of so-called flying foxes or fruit bats of the genus Pteropus; of the zebra mussel of the species Dreissena polymorpha; and such other species of wild mammals, wild birds, fish (including mollusks and crustacea), amphibians, reptiles, brown tree snakes, or the offspring or eggs of any of the foregoing which the Secretary of the Interior may prescribe by regulation to be injurious to human beings, to the interests of agriculture, horticulture, forestry, or to wildlife or the wildlife resources of the United States, is hereby prohibited. All such prohibited mammals, birds, fish (including mollusks and crustacea), amphibians, and reptiles, and the eggs or offspring therefrom, shall be promptly exported or destroyed at the expense of the importer or consignee. Nothing in this section shall be construed to repeal or modify any provision of the Public Health Service Act or Federal Food, Drug, and Cosmetic Act. Also, this section shall not authorize any action with respect to the importation of any plant pest as defined in the Federal Plant Pest Act,[1] insofar as such importation is subject to regulation under that Act.
(2) As used in this subsection, the term wild relates to any creatures that, whether or not raised in captivity, normally are found in a wild state; and the terms wildlife and wildlife resources include those resources that comprise wild mammals, wild birds, fish (including mollusks and crustacea), and all other classes of wild creatures whatsoever, and all types of aquatic and land vegetation upon which such wildlife resources are dependent.
(3) Notwithstanding the foregoing, the Secretary of the Interior, when he finds that there has been a proper showing of responsibility and continued protection of the public interest and health, shall permit the importation for zoological, educational, medical, and scientific purposes of any mammals, birds, fish (including mollusks and crustacea), amphibia, and reptiles, or the offspring or eggs thereof, where such importation would be prohibited otherwise by or pursuant to this Act, and this Act shall not restrict importations by Federal agencies for their own use.
(4) Nothing in this subsection shall restrict the importation of dead natural-history specimens for museums or for scientific collections, or the importation of domesticated canaries, parrots (including all other species of psittacine birds), or such other cage birds as the Secretary of the Interior may designate.
(5) The Secretary of the Treasury and the Secretary of the Interior shall enforce the provisions of this subsection, including any regulations issued hereunder, and, if requested by the Secretary of the Interior, the Secretary of the Treasury may require the furnishing of an appropriate bond when desirable to insure compliance with such provisions.
(b) Whoever violates this section, or any regulation issued pursuant thereto, shall be fined under this title or imprisoned not more than six months, or both.
(c) The Secretary of the Interior within one hundred and eighty days of the enactment of the Lacey Act Amendments of 1981 shall prescribe such requirements and issue such permits as he may deem necessary for the transportation of wild animals and birds under humane and healthful conditions, and it shall be unlawful for any person, including any importer, knowingly to cause or permit any wild animal or bird to be transported to the United States, or any Territory or district thereof, under inhumane or unhealthful conditions or in violation of such requirements. In any criminal prosecution for violation of this subsection and in any administrative proceeding for the suspension of the issuance of further permits
(1) the condition of any vessel or conveyance, or the enclosures in which wild animals or birds are confined therein, upon its arrival in the United States, or any Territory or district thereof, shall constitute relevant evidence in determining whether the provisions of this subsection have been violated; and
(2) the presence in such vessel or conveyance at such time of a substantial ratio of dead, crippled, diseased, or starving wild animals or birds shall be deemed prima facie evidence of the violation of the provisions of this subsection.
[1] See References in Text note below.

18 USC 43 - Force, violence, and threats involving animal enterprises

(a) Offense.— 
Whoever travels in interstate or foreign commerce, or uses or causes to be used the mail or any facility of interstate or foreign commerce
(1) for the purpose of damaging or interfering with the operations of an animal enterprise; and
(2) in connection with such purpose
(A) intentionally damages or causes the loss of any real or personal property (including animals or records) used by an animal enterprise, or any real or personal property of a person or entity having a connection to, relationship with, or transactions with an animal enterprise;
(B) intentionally places a person in reasonable fear of the death of, or serious bodily injury to that person, a member of the immediate family (as defined in section 115) of that person, or a spouse or intimate partner of that person by a course of conduct involving threats, acts of vandalism, property damage, criminal trespass, harassment, or intimidation; or
(C) conspires or attempts to do so;

shall be punished as provided for in subsection (b).

(b) Penalties.— 
The punishment for a violation of section[1] (a) or an attempt or conspiracy to violate subsection (a) shall be
(1) a fine under this title or imprisonment not[2] more than 1 year, or both, if the offense does not instill in another the reasonable fear of serious bodily injury or death and
(A) the offense results in no economic damage or bodily injury; or
(B) the offense results in economic damage that does not exceed $10,000;
(2) a fine under this title or imprisonment for not more than 5 years, or both, if no bodily injury occurs and
(A) the offense results in economic damage exceeding $10,000 but not exceeding $100,000; or
(B) the offense instills in another the reasonable fear of serious bodily injury or death;
(3) a fine under this title or imprisonment for not more than 10 years, or both, if
(A) the offense results in economic damage exceeding $100,000; or
(B) the offense results in substantial bodily injury to another individual;
(4) a fine under this title or imprisonment for not more than 20 years, or both, if
(A) the offense results in serious bodily injury to another individual; or
(B) the offense results in economic damage exceeding $1,000,000; and
(5) imprisonment for life or for any terms of years, a fine under this title, or both, if the offense results in death of another individual.
(c) Restitution.— 
An order of restitution under section 3663 or 3663A of this title with respect to a violation of this section may also include restitution
(1) for the reasonable cost of repeating any experimentation that was interrupted or invalidated as a result of the offense;
(2) for the loss of food production or farm income reasonably attributable to the offense; and
(3) for any other economic damage, including any losses or costs caused by economic disruption, resulting from the offense.
(d) Definitions.— 
As used in this section
(1) the term animal enterprise means
(A) a commercial or academic enterprise that uses or sells animals or animal products for profit, food or fiber production, agriculture, education, research, or testing;
(B) a zoo, aquarium, animal shelter, pet store, breeder, furrier, circus, or rodeo, or other lawful competitive animal event; or
(C) any fair or similar event intended to advance agricultural arts and sciences;
(2) the term course of conduct means a pattern of conduct composed of 2 or more acts, evidencing a continuity of purpose;
(3) the term economic damage
(A) means the replacement costs of lost or damaged property or records, the costs of repeating an interrupted or invalidated experiment, the loss of profits, or increased costs, including losses and increased costs resulting from threats, acts or vandalism, property damage, trespass, harassment, or intimidation taken against a person or entity on account of that persons or entitys connection to, relationship with, or transactions with the animal enterprise; but
(B) does not include any lawful economic disruption (including a lawful boycott) that results from lawful public, governmental, or business reaction to the disclosure of information about an animal enterprise;
(4) the term serious bodily injury means
(A) injury posing a substantial risk of death;
(B) extreme physical pain;
(C) protracted and obvious disfigurement; or
(D) protracted loss or impairment of the function of a bodily member, organ, or mental faculty; and
(5) the term substantial bodily injury means
(A) deep cuts and serious burns or abrasions;
(B) short-term or nonobvious disfigurement;
(C) fractured or dislocated bones, or torn members of the body;
(D) significant physical pain;
(E) illness;
(F) short-term loss or impairment of the function of a bodily member, organ, or mental faculty; or
(G) any other significant injury to the body.
(e) Rules of Construction.— 
Nothing in this section shall be construed
(1) to prohibit any expressive conduct (including peaceful picketing or other peaceful demonstration) protected from legal prohibition by the First Amendment to the Constitution;
(2) to create new remedies for interference with activities protected by the free speech or free exercise clauses of the First Amendment to the Constitution, regardless of the point of view expressed, or to limit any existing legal remedies for such interference; or
(3) to provide exclusive criminal penalties or civil remedies with respect to the conduct prohibited by this action, or to preempt State or local laws that may provide such penalties or remedies.
[1] So in original. Probably should be “subsection”.
[2] So in original. Probably should be preceded by “for”.

18 USC 44 - Repealed. Pub. L. 9779, 9(b)(2), Nov. 16, 1981, 95 Stat. 1079]

Section, acts June 25, 1948, ch. 645, 62 Stat. 687; Dec. 5, 1969, Pub. L. 91–135, § 8, 83 Stat. 281, related to marking of packages or containers used in the shipment of fish and wildlife. See section 3372 (b) of Title 16, Conservation.

18 USC 45 - Repealed. Pub. L. 101647, title XII, 1206(a), Nov. 29, 1990, 104 Stat. 4832]

Section, act June 25, 1948, ch. 645, 62 Stat. 688, related to penalties for capturing or killing carrier pigeons.

18 USC 46 - Transportation of water hyacinths

(a) Whoever knowingly delivers or receives for transportation, or transports, in interstate commerce, alligator grass (alternanthera philoxeroides), or water chestnut plants (trapa natans) or water hyacinth plants (eichhornia crassipes) or the seeds of such grass or plants; or
(b) Whoever knowingly sells, purchases, barters, exchanges, gives, or receives any grass, plant, or seed which has been transported in violation of subsection (a); or
(c) Whoever knowingly delivers or receives for transportation, or transports, in interstate commerce, an advertisement, to sell, purchase, barter, exchange, give, or receive alligator grass or water chestnut plants or water hyacinth plants or the seeds of such grass or plants Shall be fined under this title, or imprisoned not more than six months, or both.

18 USC 47 - Use of aircraft or motor vehicles to hunt certain wild horses or burros; pollution of watering holes

(a) Whoever uses an aircraft or a motor vehicle to hunt, for the purpose of capturing or killing, any wild unbranded horse, mare, colt, or burro running at large on any of the public land or ranges shall be fined under this title, or imprisoned not more than six months, or both.
(b) Whoever pollutes or causes the pollution of any watering hole on any of the public land or ranges for the purpose of trapping, killing, wounding, or maiming any of the animals referred to in subsection (a) of this section shall be fined under this title, or imprisoned not more than six months, or both.
(c) As used in subsection (a) of this section
(1) The term aircraft means any contrivance used for flight in the air; and
(2) The term motor vehicle includes an automobile, automobile truck, automobile wagon, motorcycle, or any other self-propelled vehicle designed for running on land.

18 USC 48 - Depiction of animal cruelty

(a) Creation, Sale, or Possession.— 
Whoever knowingly creates, sells, or possesses a depiction of animal cruelty with the intention of placing that depiction in interstate or foreign commerce for commercial gain, shall be fined under this title or imprisoned not more than 5 years, or both.
(b) Exception.— 
Subsection (a) does not apply to any depiction that has serious religious, political, scientific, educational, journalistic, historical, or artistic value.
(c) Definitions.— 
In this section
(1) the term depiction of animal cruelty means any visual or auditory depiction, including any photograph, motion-picture film, video recording, electronic image, or sound recording of conduct in which a living animal is intentionally maimed, mutilated, tortured, wounded, or killed, if such conduct is illegal under Federal law or the law of the State in which the creation, sale, or possession takes place, regardless of whether the maiming, mutilation, torture, wounding, or killing took place in the State; and
(2) the term State means each of the several States, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, Guam, American Samoa, the Commonwealth of the Northern Mariana Islands, and any other commonwealth, territory, or possession of the United States.

18 USC 49 - Enforcement of animal fighting prohibitions

Whoever violates subsection (a), (b), (c), or (e) of section 26 of the Animal Welfare Act shall be fined under this title, imprisoned for not more than 5 years, or both, for each violation.